Last reviewed: August 30, 2026. Educational content for adults 21+. This is not medical or legal advice. Kiody does not sell concentrated 7-OH products.
Suggested page or content hub: Learning Center → Lab Testing & Product Quality
Suggested slug: /learn/kratom-reference-materials-calibration-standards/
SEO title: Kratom Reference Materials and Calibration Standards Explained
Last fact-check: August 29, 2026
Review status: Draft for scientific, editorial and legal review; not published
Draft word count: 5,625 words
Kiody scope note: Kiody serves adults 21+ and focuses on ordinary botanical kratom leaf powder and pure-leaf capsules containing approximately 500 mg of leaf per capsule. Kiody does not sell concentrated 7-hydroxymitragynine (7-OH). This guide is educational. It does not provide medical advice, establish that a product is risk-free or determine legal status.
The short answer
A laboratory instrument does not inherently know that a peak represents 1.2% mitragynine, 300 parts per million of lead or 0.02% 7-OH. It produces a signal. The laboratory turns that signal into an identity or quantity by comparing it with materials whose relevant properties are already known well enough for the intended measurement.
Those known materials may be called reference materials, certified reference materials, calibration standards, reference standards, working standards, internal standards, reference cultures or quality-control materials. The terms are related, but they do not all mean the same thing.
The quality of a certificate of analysis therefore depends partly on a chain that most customers never see:
- the identity and assigned value of the reference material;
- the certificate and uncertainty supporting that value;
- correct receipt and storage;
- accurate weighing and preparation of stock and working solutions;
- a suitable calibration model;
- independent quality-control checks;
- proper calculations, including purity and dilution corrections; and
- records connecting the final report to every step in that chain.
If one link is wrong, a result can look precise while being systematically biased. This guide explains how reference materials work, what “traceable” should mean, and what Kiody can reasonably ask a laboratory to document.
Why kratom results need external measurement anchors
Many laboratory instruments are comparative. A liquid chromatograph may separate mitragynine and 7-OH and produce peaks with areas related to concentration. An ICP-MS instrument may produce signals related to the amount of lead or cadmium in a digested sample. Neither signal becomes a defensible concentration until it is related to standards and a validated measurement process.
The National Institute of Standards and Technology describes metrological traceability as a property of a measurement result through which the result can be related to a reference by a documented, unbroken chain of calibrations, with each link contributing to uncertainty. NIST also emphasizes that the organization providing a result is responsible for supporting its traceability claim. NIST does not automatically certify every result merely because a laboratory used an item marketed as “NIST traceable.” See NIST’s metrological-traceability policy and FAQ.
That distinction protects customers from a common marketing shortcut. “NIST traceable” should describe a documented measurement relationship, not function as a vague logo or quality badge.
For kratom testing, the required anchor depends on the question:
- Identity: Does the material contain the expected botanical or chemical marker?
- Quantitation: How much mitragynine, 7-OH, lead or another analyte is present?
- Presence or absence: Was Salmonella detected in the defined test portion?
- Enumeration: How many colony-forming units were measured under the method?
- Physical property: What is the water activity at the stated temperature?
Each type of result needs appropriate references, controls and documentation.
Reference material, certified reference material and reference standard
Reference material
FDA’s Elemental Analysis Manual section on reference materials explains that reference materials can support method validation, verification, calibration and quality control. A reference material has one or more properties that are sufficiently homogeneous, stable and established for its intended measurement use.
The property might be the concentration of lead in a plant-like powder, the purity of an alkaloid standard, the identity of a microbial strain or the water activity of a verification material.
Not every reference material is certified. A laboratory may prepare an in-house material and characterize it for a limited purpose. The strength of the evidence depends on how the value was assigned, how homogeneity and stability were established and whether the material is independent of the calibration being checked.
Certified reference material
A certified reference material, or CRM, comes with documentation from a competent producer. NIST’s SRM definitions describe a CRM as a reference material characterized through a metrologically valid procedure and accompanied by a certificate that provides the certified property value, its associated uncertainty and a statement of metrological traceability.
A certificate is not ornamental paperwork. It tells the user what was certified, how the material should be handled, which value applies, what uncertainty accompanies it and what limitations must be respected.
NIST Standard Reference Material
Standard Reference Material®, or SRM®, is NIST’s name for certified reference materials produced and distributed by NIST. NIST provides more than 1,200 SRMs with well-characterized composition or properties to support accurate and compatible measurements. See the NIST Standard Reference Materials program.
An SRM can be highly valuable, but there is not necessarily a NIST SRM for every kratom matrix and alkaloid. A laboratory should not imply that an unrelated SRM is “kratom certified.” A food or botanical SRM may support parts of a method—such as elemental recovery in a comparable matrix—without being a complete substitute for kratom-specific validation.
Reference standard
In analytical chemistry, “reference standard” often describes a substance of known identity and assigned purity or potency used to identify or quantify an analyte. A laboratory might obtain separate chemical reference standards for mitragynine and 7-OH.
The term alone does not establish quality. The reviewer still needs to know the source, lot, certificate, identity evidence, assigned value, uncertainty or purity information, expiration or retest date, storage requirements and intended use.
The U.S. Pharmacopeia also distributes official reference standards for compendial test and assay use. USP states that its reference standards are for analytical use and are not products for administration to humans or animals. See USP Reference Standards and its reference-standard FAQ.
Primary, secondary and working standards
Laboratories often create a controlled hierarchy so an expensive or limited primary material does not have to be used for every routine run.
Primary reference standard
A primary reference standard has a highly established identity and assigned value. It may be an official compendial reference standard or a high-quality CRM from a competent producer. Its documentation should support the intended use.
Secondary reference standard
A secondary standard is qualified by comparison with the primary standard. It can then be used for routine work within a documented period and purpose. The qualification should establish that the secondary material produces results consistent with the primary standard under the intended method.
FDA’s laboratory-controls Q&A explains, in the drug CGMP context, that new batches of highly pure reference material used as secondary standards should be qualified against a primary reference standard. That drug guidance is not a declaration that kratom is an approved drug or dietary supplement. It is a useful analytical-quality benchmark for understanding standard qualification.
Working standard
A working standard may be the material or solution used day to day. Its value must remain connected to the qualified higher-order material through documented preparation, comparison and controls. The laboratory should define how often it is requalified and what happens when the primary lot changes.
Calling a bottle a “working standard” does not excuse missing identity, purity, preparation or stability evidence.
Neat materials, stock solutions and working solutions
Reference material may arrive as a neat powder, concentrated solution, matrix material or culture. Each form creates different risks.
Neat chemical standard
A neat mitragynine or 7-OH standard may require precise weighing on a suitable balance. The laboratory may need to account for:
- assigned purity or potency;
- water or residual solvent;
- whether the certificate value is as-is or dried basis;
- salt form versus free-compound basis;
- hygroscopic behavior;
- static charge and material loss;
- minimum sample mass; and
- balance calibration and uncertainty.
A displayed balance reading is not automatically the true analyte mass. If 10.0 mg of material is only 95.0% assigned purity, a calculation that assumes 100% creates a 5% concentration error before the instrument analyzes anything.
Certified solution
A certified solution can reduce small-mass weighing error, but it introduces other questions. The laboratory should verify the analyte, solvent, concentration unit, uncertainty, storage conditions and expiration. Evaporation, freezing, adsorption, light exposure or repeated opening can change some solutions.
Stock standard solution
The stock solution is a concentrated laboratory preparation used to make lower-level standards. Its record should include:
- material source and lot;
- certificate value and correction applied;
- mass or volume used;
- balance and volumetric equipment identification;
- solvent and final volume;
- preparer’s name or initials;
- preparation date;
- storage conditions;
- expiration or reassessment date; and
- independent verification or review.
Working calibration solutions
Working solutions establish points across the method’s calibration range. They may be freshly prepared or stored for a validated period. The laboratory should demonstrate that the analyte remains stable in the chosen solvent, container and conditions.
The working range should be relevant to the samples. A curve designed only for high-concentration extracts may not support trace-level 7-OH measurement in botanical leaf without an appropriate low-level range, sensitivity and validation.
What a reference-material certificate should tell the laboratory
A laboratory should review the certificate before using the material, not merely file it after receipt. Important fields can include:
- Producer and material name.
- Catalog and lot or batch number.
- Intended use.
- Certified, reference or information values.
- Chemical form and identity.
- Matrix description.
- Assigned concentration, purity or property.
- Unit and measurement basis.
- Associated uncertainty.
- Traceability statement.
- Characterization method.
- Homogeneity and stability information.
- Minimum sample amount, when applicable.
- Storage and handling instructions.
- Preparation instructions, including drying or mixing.
- Expiration, validity or issue date.
- Safety information.
- Limitations and non-certified values.
The distinction between certified and informational values is important. A certificate may list many analytes, but only some may have certified values. The others may be reference or information values supported by different evidence. A laboratory should not silently promote every number on the sheet to certified status.
Purity, potency and chemical-form corrections
One of the easiest ways to produce a consistent but wrong calibration is to mishandle the certificate’s assigned value.
Purity correction
Suppose a laboratory weighs 10.00 mg of an alkaloid standard with an assigned purity of 97.0%. The amount of assigned analyte is 9.70 mg before any other correction. Preparing a nominal 10.00 mg standard without the purity correction biases the calibration.
This example illustrates the concept only. An actual laboratory must follow the certificate, method and controlled calculation. It must also determine whether the assigned value already accounts for water, solvent, salt form or another factor.
Salt versus free-base basis
A compound supplied as a salt has a different molecular mass from the free compound. A certificate may assign the value on an as-supplied, salt or free-base basis. The method’s reporting convention must match the calculation.
This is not a technical footnote when comparing a result with a specification or legal threshold. Reporting a salt-equivalent value as free compound, or the reverse, can create a material difference.
Dry-weight versus as-received basis
Matrix reference materials and botanical samples may contain moisture. A certificate may require drying or may provide values on a dry-mass basis. If the sample result is reported as received while the standard or comparison value is interpreted as dry weight, the results are not directly comparable.
Kiody’s How to Read Kratom Alkaloid Results guide explains conversions among percent, parts per million, milligrams per gram and different reporting bases.
Calibration curves: how standards become reported concentrations
For many quantitative methods, the laboratory prepares standards at several concentrations and measures their responses. The mathematical relationship between concentration and response is the calibration model.
Calibration range
The range should cover the expected sample concentrations or support validated dilution into range. Results above the highest standard should not simply be extrapolated unless the method has justified that practice. A sample below the validated reporting range should not be converted into an exact-looking number unsupported by the method.
Number and placement of points
More points do not automatically guarantee a better curve. They need to be accurately prepared and appropriately distributed. Low-level decisions may require enough points near the reporting limit to establish suitable performance.
Blanks and zero standards
A reagent blank can reveal contamination or background. A zero standard may contain solvent and internal standard without the target analyte. The two concepts are method-specific and should not be treated as interchangeable without context.
Calibration model and weighting
A straight-line model may be suitable over one range and unsuitable over another. Weighted regression can prevent high-concentration points from dominating a broad curve. The laboratory should choose and validate the model before routine use rather than selecting whichever equation makes a particular sample pass.
Back-calculation and acceptance
The method should define how closely the calculated concentrations of the standards must match their assigned concentrations. A high correlation coefficient alone is not enough. A curve can have an impressive-looking coefficient while individual points show unacceptable bias or the model is inappropriate near the decision level.
Continuing calibration checks
Long analytical runs may use continuing calibration verification or check standards to detect drift. The check should be prepared and evaluated according to the method. When possible, an independently prepared source offers stronger protection against a common preparation error.
Calibration standards are not the same as quality-control materials
Using the same solution to create the calibration and “verify” it can make the check circular. If the stock concentration is wrong, both the curve and the check can agree.
A quality-control material should provide an independent challenge appropriate to the method. Examples include:
- a second-source chemical standard;
- a matrix CRM with an assigned analyte value;
- a fortified matrix sample prepared independently;
- a laboratory control sample;
- a duplicate or replicate sample;
- a blank;
- a continuing calibration verification standard; or
- a retained control material tracked over time.
Each control answers a different question. A blank checks for contamination or carryover. A spike can assess recovery in a matrix. A second-source standard can challenge the calibration source. A matrix CRM can assess the combined preparation and measurement process.
FDA’s Elemental Analysis Manual states that reference materials are used for calibration and quality control as well as method validation and verification. Its current methods also encourage traceable standards or CRMs when available. These FDA materials are useful technical benchmarks; they do not constitute FDA approval of kratom or of a particular private laboratory.
Matrix reference materials and the “same analyte” problem
A pure chemical solution cannot reproduce every challenge posed by kratom powder. Botanical samples contain pigments, plant solids and many co-occurring compounds. Those matrix components may affect extraction, ionization, chromatography, digestion or detection.
A matrix reference material contains the analyte within a material intended to resemble real samples. It can test more of the full process—from weighing and preparation through final measurement.
There may not be a certified kratom matrix material for every target. A laboratory might use a comparable botanical or food matrix for specific purposes, while separately validating kratom recovery and selectivity. The limitation should be documented.
For example, a plant-based CRM with certified lead can provide evidence for elemental digestion and analysis in a botanical-like matrix. It does not demonstrate accurate mitragynine measurement. A pure 7-OH standard can support identification and calibration, but it does not by itself prove complete recovery of 7-OH from a complex extract or ordinary leaf powder.
Internal standards, surrogates and external calibration
The word “standard” appears in several method components that serve different roles.
External calibration standard
External standards are analyzed separately from the samples. Their response establishes the calibration relationship. Sample concentration is calculated from that relationship.
Internal standard
An internal standard is added in a controlled amount to calibration standards, controls and samples. It can help compensate for variation in preparation, injection or instrument response. Ideally, it behaves similarly to the analyte while remaining distinguishable.
An internal standard is not automatically a reference material for the target analyte. It supports correction or monitoring, but the target-analyte calibration still needs a known anchor.
Surrogate
A surrogate is a compound added to evaluate performance through the analytical process, often where it is not expected naturally in the sample. Recovery can reveal extraction or matrix problems. Surrogates are method-specific and must be interpreted within established acceptance criteria.
Isotopically labeled standard
Some mass-spectrometry methods use an isotopically labeled version of the analyte as an internal standard. This can provide strong correction for certain preparation and instrument effects, but it does not remove the need for validation, suitable calibration and correctly assigned standard concentrations.
Storage, stability and expiration
An excellent reference material can become unreliable if it is mishandled. The laboratory should follow the certificate and maintain records demonstrating appropriate conditions.
Potential controls include:
- documented receipt date and condition;
- temperature-controlled storage;
- light protection;
- humidity or desiccation controls;
- limited opening time;
- suitable container and closure;
- aliquoting to reduce repeated freeze-thaw cycles;
- inventory and usage records;
- expiration or retest-date controls; and
- a procedure for excursions.
“Kept in the refrigerator” is not complete documentation when the certificate specifies a temperature range and protection from light. A temperature excursion should be assessed scientifically, not ignored because the bottle still looks normal.
The laboratory should distinguish the producer’s expiration or validity date from an internal solution expiration. A stock solution prepared today may have a much shorter supported life than the unopened reference material from which it was made.
Lot changes and bridging
When a laboratory changes reference-material lot, it should determine whether the new lot produces equivalent performance. A controlled bridge can compare old and new material, examine certificate values and verify that calculations, retention times or response factors remain appropriate.
A sudden shift in customer results after a standard-lot change is a warning sign. The laboratory should investigate whether the change reflects the samples, the new assigned value, preparation, instrument response or another factor.
Records should allow the laboratory to identify which standard lot supported every customer result. That traceability becomes essential if a producer later revises a certificate or a preparation error is discovered.
Reference cultures and microbiology controls
Chemical reference standards are not the only external anchors. Microbiology laboratories use authenticated reference cultures and control organisms to evaluate media, methods and analyst performance.
The relevant record may identify the organism, strain designation, recognized culture collection, passage history, preparation, concentration where applicable, storage and expiration. A generic label such as “positive control” is inadequate if the organism and source cannot be traced.
The FDA’s LAAF record provisions in 21 CFR Part 1, Subpart R illustrate the level of detail regulators may expect in a defined accredited-testing program: source and purity of reference standards, certified reference materials, reference cultures, preparation, storage and expiration information. LAAF has a limited statutory scope and does not mean every kratom laboratory is FDA-accredited. Its documentation requirements remain a useful quality-literacy example.
Microbiology controls do not prove that a particular kratom lot is free of all organisms. They help demonstrate that the method and run behaved as expected for the organisms and conditions evaluated.
Reference materials for heavy-metal testing
For lead, arsenic, cadmium and mercury, a laboratory may use certified elemental solutions to prepare calibration standards and a matrix CRM to assess digestion and measurement recovery.
Important questions include:
- Are individual-element or multi-element standards used?
- Could one element interfere with another?
- Is the standard concentration certified and within its validity period?
- Does the matrix CRM include certified values for each reported element?
- Are arsenic and mercury reported as total elements or specific chemical species?
- Are blanks and second-source checks acceptable?
- Does the laboratory control contamination from vessels, reagents and the environment?
A certificate listing lead as certified but nickel as informational does not support identical claims for both values. Each analyte needs its own evidence.
Reference materials for mitragynine and 7-OH
Kratom alkaloid measurement adds several specific concerns.
Exact chemical identity
The laboratory should verify that the standard is the intended compound and chemical form. Mitragynine, 7-OH, mitragynine pseudoindoxyl, MGM-15 and MGM-16 are not interchangeable names for one analyte.
Assigned purity and impurities
The certificate should explain the assigned value and relevant impurities. An unidentified impurity that contributes to a detector response can bias a result. Chromatographic resolution and spectral confirmation help establish selectivity, but the standard’s characterization remains important.
Concentration range
Ordinary botanical leaf and concentrated products can require very different ranges. A high-level calibration may not support a low reporting limit, while a low-level curve may require dilution of high-concentration samples. Kiody does not sell concentrated 7-OH.
Matrix and recovery
Pure standards do not establish extraction efficiency from leaf powder or capsules. The method should include appropriate recovery, matrix and quality-control evidence.
Legal-threshold decisions
If a result is compared with a legal threshold, the laboratory should document the exact analyte, unit, reporting basis, assigned standard value and uncertainty. A defensible decision cannot rest on a rounded number detached from its measurement chain.
Current federal 7-OH context
As of August 29, 2026, DEA’s federal threshold action for 7-OH remains a proposal and notice of intent, not an effective final scheduling order. The proposed criteria include more than 0.050% 7-OH on a dry-weight basis for botanical material and specified criteria for other articles, including more than 0.050% by an applicable concentration basis or more than 1 mg of 7-OH per article. The complete conditions matter; the numbers should not be separated from the official definition. See the DEA proposal published July 6, 2026.
HHS extended the public-comment deadline to September 10, 2026. The extension did not itself schedule 7-OH or create a new federal sales, possession or shipping ban. See the August 26, 2026 extension notice.
A separate DEA temporary order placed mitragynine pseudoindoxyl, MGM-15 and MGM-16 in Schedule I effective August 26, 2026 through August 26, 2028, unless later extended or changed. See the effective derivative order.
These legal distinctions reinforce the need for exact reference standards and unambiguous reporting. A chromatographic peak cannot be labeled “7-OH related” when the legal question depends on the identity of a specifically controlled or proposed compound.
State and local law may be stricter or use a different calculation basis. Kiody’s nationwide botanical-leaf and 7-OH trackers should be reviewed before any commerce decision.
Ten warning signs in reference-material documentation
- “NIST traceable” appears with no chain or certificate. The claim should connect the result to a documented reference, not merely invoke NIST’s name.
- The standard lot is missing from the analytical record. The laboratory cannot reconstruct which assigned value supported the result.
- The certificate is expired, superseded or for another lot. Similar catalog numbers do not make lots interchangeable.
- Purity is stated but no correction is documented. The nominal weighed mass may not equal analyte mass.
- The chemical form is unclear. Salt, hydrate, solvate and free-compound bases may require different calculations.
- The calibration and QC come from one preparation with no independent check. A common stock error may remain invisible.
- The calibration range does not cover the reported value. Unsupported extrapolation can create a precise-looking but unreliable result.
- The matrix control is unrelated to the test. Passing a lead CRM does not validate alkaloid recovery.
- Storage conditions are undocumented. A valid certificate cannot compensate for degraded or evaporated material.
- The laboratory calls every value certified. Certificates often distinguish certified, reference and informational values.
What Kiody can ask a laboratory
Kiody does not need to receive every proprietary instrument file to perform a sensible qualification review. It can ask for focused evidence tied to the tests it relies on:
- What reference material or standard supports each reported analyte?
- Who produced it, and what are the catalog and lot numbers?
- Is the assigned value certified, reference or informational?
- What purity, potency, water or chemical-form corrections are applied?
- Is the material within its validity period and stored as instructed?
- What calibration range covers the Kiody samples?
- Is the result interpolated within the curve or produced after validated dilution?
- What independent QC challenges the calibration source?
- Is there a relevant matrix reference material or fortified matrix control?
- How are new standard lots bridged or qualified?
- Can the laboratory trace every reported result to the standard lot and preparation record?
- What is the measurement uncertainty near Kiody’s decision levels?
- How does the laboratory investigate failed calibration or QC?
- Does the activity appear on the laboratory’s current accredited scope?
Answers should be evaluated together with method validation, proficiency testing, accreditation, sampling and lot traceability. No single certificate replaces the complete system.
A proposed Kiody reference-material review record
For each critical analyte or test category, Kiody could maintain a controlled review containing:
- Laboratory and testing-site name.
- Product form and matrix.
- Analyte or organism.
- Method and technique.
- Reference-material category: CRM, SRM, official reference standard, commercial standard, in-house material or culture.
- Producer and competence information.
- Catalog and lot number.
- Certificate issue or revision.
- Assigned value and unit.
- Value category: certified, reference or informational.
- Uncertainty and traceability statement.
- Purity, potency or chemical-form basis.
- Storage and validity requirements.
- Calibration range relevant to Kiody samples.
- Stock and working-solution controls.
- Independent second-source or matrix QC.
- New-lot qualification process.
- Deviation or excursion status.
- Reviewer and review date.
- Gap, risk decision and next review date.
The record should not publish confidential laboratory details. It should allow Kiody to demonstrate that it asked the right questions and understood the evidence supporting a customer-facing COA.
Frequently asked questions
What is a kratom reference material?
It is a sufficiently homogeneous, stable and characterized material used for an analytical purpose such as calibration, method assessment, value assignment or quality control. It may be a pure alkaloid, certified solution, botanical matrix, elemental standard or authenticated culture.
Is every reference material certified?
No. A certified reference material comes with specified certified values, uncertainties and traceability documentation from a competent producer. Other reference materials can be useful but may carry less authoritative value assignments.
What is a NIST SRM?
Standard Reference Material® is NIST’s designation for a CRM it produces and distributes. An SRM supports specified measurements described in its certificate. It does not automatically certify a kratom laboratory or product.
What does “NIST traceable” mean?
A valid claim should identify a documented, unbroken calibration chain connecting a measurement result to a specified reference, with uncertainty considered at each link. NIST says the result provider must support the claim; NIST does not certify unrelated private results merely because its name appears in the chain.
Why does the purity on an alkaloid certificate matter?
Because the weighed material may not be 100% target analyte. If the assigned purity or potency is not applied correctly, every calibration point and customer result can be biased.
Is a calibration standard the same as a quality-control sample?
Not necessarily. Calibration standards establish the response relationship. An independent QC material checks whether that relationship and the analytical process are performing acceptably.
Why use a second-source standard?
It can reveal a problem shared by calibration standards prepared from one source or stock. Independence makes the check more informative.
Can a pure mitragynine standard prove recovery from kratom powder?
No. It can support identity and calibration, but extraction recovery and matrix effects require additional validation and matrix-appropriate controls.
Can one alkaloid standard be used to quantify another alkaloid?
Only if a validated method scientifically supports that approach and clearly states its limitations. Different compounds can have different detector responses. For legal or high-risk decisions, analyte-specific standards are generally stronger evidence.
What is a matrix reference material?
It is a characterized material in which the analyte is present within a sample-like matrix. It challenges more of the preparation and measurement process than a pure solution alone.
Does an unexpired standard guarantee it is valid?
No. It must also be stored and handled correctly. A temperature excursion, evaporation, contamination or repeated freeze-thaw cycle can affect a material before the printed date.
What happens when the laboratory changes standard lots?
The laboratory should review the new certificate, update assigned-value calculations and qualify or bridge the new lot as required by its procedure. Results should remain traceable to the specific lot used.
Why do dry-weight and as-received results differ?
Dry-weight reporting mathematically removes the effect of measured moisture, while as-received reporting includes the sample in its received condition. The standard, method, COA and legal threshold must use compatible bases.
Does a traceable result prove a product is safe?
No. Traceability supports confidence in the measurement relationship. It does not test every hazard, prove medical benefit, create FDA approval or override the law.
Does Kiody sell concentrated 7-OH?
No. Kiody focuses on ordinary botanical kratom leaf products for adults 21+ and does not sell concentrated 7-OH.
Practical takeaway
The number on a COA is the end of a measurement chain, not the beginning. A defensible result connects the reported value to properly identified and characterized reference materials, correctly prepared standards, a suitable calibration model, independent quality controls and complete records.
For Kiody, the most useful review is analyte-specific. Ask what standard supports mitragynine, what supports 7-OH, which CRMs support each metal and which authenticated cultures support microbiology controls. Confirm the exact lot, value, unit, uncertainty, chemical form, validity and storage. Then verify that the calibration range and matrix controls fit the actual leaf powder or pure-leaf capsules being tested.
Reference materials cannot guarantee safety or legal compliance. They can make the analytical evidence more transparent, reproducible and defensible—which is exactly what a trustworthy COA should provide.
Primary and authoritative sources
- National Institute of Standards and Technology, Standard Reference Materials.
- NIST, Reference Materials overview.
- NIST, SRM definitions.
- NIST, Metrological Traceability: Policy and Frequently Asked Questions.
- U.S. Food and Drug Administration, Elemental Analysis Manual, Section 3.5: Reference Materials, December 2021.
- FDA, Elemental Analysis Manual glossary, October 2021.
- FDA, Guidelines for the Validation of Chemical Methods for the FDA Foods Program.
- FDA, Questions and Answers on CGMP Requirements—Laboratory Controls.
- Electronic Code of Federal Regulations, 21 CFR Part 111.
- Electronic Code of Federal Regulations, 21 CFR Part 1, Subpart R.
- U.S. Pharmacopeia, USP Reference Standards.
- USP, Reference Standards FAQ.
- Drug Enforcement Administration, Proposed temporary placement of 7-OH above a specified threshold, July 6, 2026.
- Department of Health and Human Services, Extension of the 7-OH comment period, August 26, 2026.
- Drug Enforcement Administration, Temporary placement of mitragynine pseudoindoxyl, MGM-15 and MGM-16 in Schedule I, August 26, 2026.