Nutraceutical Testing Checklist: What to Request Before Launching a Supplement

Before launching a new dietary supplement, a brand should request seven categories of nutraceutical testing. These are ingredient identity, potency against label claim, heavy metals, microbial contaminants, pesticides and residual solvents where the formula calls for them, undeclared drugs and banned substances, and stability data. The first four are required in some form by FDA's manufacturing rule at 21 CFR 111.75. The remaining tests depend on the ingredients, the dosage form, the sales channel, and the intended customer.

The order matters. Identity testing happens at the raw material stage, contaminant testing can happen at either stage, and label claim, microbial, and drug screening happen on the finished lot. Stability work starts early because it takes months to produce usable data. Amazon requires much of this testing as a condition of listing in several categories, so completing it before launch avoids relisting delays later.

What Is Nutraceutical Testing?

Nutraceutical testing is the laboratory analysis of dietary supplements, functional foods, and their ingredients to confirm identity, purity, strength, composition, and limits on contaminants as outlined in 21 CFR 111. Standard categories of contaminants include heavy metals, microorganisms, pesticides, residual solvents, and undeclared drugs. Results are compared against written specifications set by the manufacturer and against limits published by FDA, USP, or other recognized bodies.

The Pre-Launch Testing Checklist

Each item below notes the stage where testing is most useful and the standard that typically defines the acceptance limit.

• Ingredient identity. Every dietary ingredient lot, before use. Required under 21 CFR 111.75(a)(1). Methods include HPLC, HPTLC, FTIR, and DNA-based methods for botanicals.
• Potency and label claim. Finished product, every lot or a statistically justified subset. Required under 21 CFR 111.75(c). Amazon references the labeling tolerances in 21 CFR 101.36 and 101.9(g).
• Heavy metals. Raw materials and finished product. Arsenic, cadmium, lead, and mercury by ICP-MS. USP General Chapter <2232> sets permitted daily exposures; California Proposition 65 sets a separate lead level.
• Microbial contaminants. Finished product. Total aerobic count, yeast and mold, and absence of Salmonella, E. coli, and Staphylococcus aureus under USP methods <2021> and <2022> with limits outlined in USP <2023>.
• Pesticides and residual solvents. Botanical raw materials and extracts. USP <561> for pesticides, USP <467> for solvents. Mycotoxins (aflatoxins) for at-risk botanicals and grains.
• Undeclared drugs and banned substances. Third-party certification programs cover custom lists of banned substances spanning from about 150 drugs to BSCG's industry leading coverage of more than 450 drugs. Amazon now requires annual testing of sports nutrition, weight management, sexual health, and joint health categories for specific lists of pharmaceutical adulterants.
• Stability. Finished product in final packaging, label claim testing at multiple time points. Supports any expiration date printed on the label.

A brand does not need to run every test itself. Under 21 CFR 111.75(a)(2), a manufacturer may rely on a supplier's certificate of analysis for purity, strength, and composition once it has qualified that supplier by confirming the supplier's results. Identity testing on incoming dietary ingredients cannot be delegated this way unless FDA grants an exemption by petition.

Ingredient Identity Testing

Identity testing confirms that the material in the drum is the ingredient named on the supplier's paperwork. It is the single test FDA requires on 100 percent of incoming dietary ingredient lots. The rule at 21 CFR 111.75(a)(1) allows no substitution of a supplier COA for this step without a granted petition.

FDA inspections continue to cite missing identity specifications. A 2024 warning letter to Western Innovations, Inc. and a 2025 letter to Mericon Industries, Inc. both document failures to establish component specifications for identity, purity, strength, and composition.

The method must fit the material. A botanical extract may need a chromatographic fingerprint, while a mineral salt may be confirmed with a simpler spectroscopic test.

Identity testing also serves a second purpose. Ingredients sold under trade names or plant aliases can conceal synthetic stimulants or research chemicals. The BSCG Dietary Supplement Ingredient Advisory List documents ingredients that do not qualify as lawful dietary ingredients in the U.S., including compounds that appear under multiple chemical names or extract aliases. Reviewing a formula against a list of this kind before purchasing raw materials reduces the chance that identity testing turns up a surprise.

Potency and Label Claim Testing

Label claim testing measures the amount of each active ingredient in the finished product and compares it to the Supplement Facts panel. Under 21 CFR 111.75(c), the manufacturer must verify that finished batches meet specifications for identity, purity, strength, and composition. This can be done on every batch or on a subset selected through a sound statistical sampling plan.

Testing every declared ingredient in a complex formula is often impractical. The rule allows quality control personnel to select one or more specifications that, if met, demonstrate the process is producing a compliant product. In practice, many programs verify a subset of nutrient markers per finished product. BSCG states that its Certified Quality finished-product label verification generally confirms two markers along with screening for heavy metals, microbiological agents, and pesticides, while ingredient certification verifies identity and full specifications.

Two details often cause failures at launch. First, any overage built into the formula to cover degradation should be documented in the specification and checked against the labeling tolerances in 21 CFR 101.36 and 101.9(g). Second, potency should be measured in the final dosage form, not only on the blend, because encapsulation, tableting, and coating can alter results.

Heavy Metals Testing

Heavy metals testing quantifies arsenic, cadmium, lead, and mercury, usually by inductively coupled plasma mass spectrometry (ICP-MS). USP General Chapter <2232> defines permitted daily exposure (PDE) values for these four elements in finished supplements and allows a risk-based approach to the extent of testing. Published summaries of the chapter list PDEs of 5 mcg/day for lead, 5 mcg/day for cadmium, 15 mcg/day for inorganic arsenic, and 15 mcg/day for total mercury.

California sets a stricter bar for lead. The state's Office of Environmental Health Hazard Assessment lists a Proposition 65 Maximum Allowable Dose Level for lead of 0.5 mcg/day. Products sold into California that exceed this level require a warning, which is different than a release limit or a level of toxicity. USP itself notes that Proposition 65 may require different limits and that manufacturers remain responsible for local requirements.

Results should be converted from concentration (mcg/g) to daily exposure (mcg/day) using the maximum labeled serving. A powder with a 30-gram serving faces a much tighter concentration limit than a capsule with a 500-milligram serving. Mineral-rich botanicals, clays, marine ingredients, and cocoa are examples of ingredients that can carry elevated levels.

Microbial Testing

Microbial testing checks for total aerobic bacteria, yeast and mold, and specific pathogens. USP <2021> covers enumeration of total counts, and USP <2022> covers absence of specified organisms such as Salmonella, Escherichia coli, and Staphylococcus aureus. Acceptance limits in USP <2023> vary by dosage form and ingredient type, so the specification should be written for the specific product rather than copied from a template.

Microbial results are lot-specific and can change with storage, humidity, and handling after manufacture. Finished product testing at release is the standard practice. Higher-risk matrices, such as products with high water activity, may justify additional in-process controls.

Pesticides, Residual Solvents, and Mycotoxins

These three tests apply to botanical ingredients and extracts rather than to every supplement. USP <561> Articles of Botanical Origin sets out pesticide residue limits and ties them to EPA tolerances and Codex standards where they exist. Amazon's policy states that products in its high-risk categories may also be tested for pesticides. The decision is "based on a review of the finished product components."

USP <467> Residual Solvents classifies solvents into three classes and sets permitted daily exposure limits. Solvent testing is relevant when an extract was produced with ethanol, hexane, acetone, or other organic solvents. USP states that Class 1 solvents such as benzene should be avoided; Class 2 and 3 solvents have defined permitted daily exposures. BSCG lists Class 1, 2, and 3 solvent panels, along with aflatoxin testing, among its a la carte testing services.

Mycotoxin testing, most often for aflatoxins, applies to grain-based ingredients, nuts, seeds, and some botanicals stored in humid conditions. A supplier's COA may already include these results, but the brand should confirm the lab, the method, and the reporting limits before accepting them.

Banned Substance and Undeclared Drug Testing

Banned substance testing screens a finished product for drugs that should not be present. Targets include anabolic agents, stimulants, diuretics, pharmaceuticals such as sildenafil or sibutramine, and other compounds on the WADA Prohibited List. This testing is not required by 21 CFR Part 111. It is required by Amazon for five product categories and by sport organizations, military programs, and team dietitians that maintain approved-supplement lists.

A 2026 systematic review in Frontiers in Sports and Active Living covered 44 studies. It found that roughly 9 to 15 percent of commercially available supplements tested were contaminated with prohibited substances or unapproved pharmacological agents. The review reports contamination was most frequent in pre-workout, weight-loss, and muscle-building products.

A 2018 analysis in JAMA Network Open reviewed FDA warnings from 2007 through 2016 and identified 776 supplements containing unapproved pharmaceutical ingredients. Most were marketed for sexual enhancement, weight loss, or muscle building.

Contamination can enter through shared manufacturing equipment or through a raw material that was adulterated upstream. For that reason, drug screening is most meaningful on the finished lot rather than on raw materials alone.

Screening menus vary by provider. BSCG states that its Certified Drug Free program tests every production lot for more than 450 drugs. That menu includes over 400 drugs on the WADA Prohibited List and more than 50 prescription, over-the-counter, and illicit drugs. Its published testing menu reports method detection levels in parts per billion (ng/g) and states that the menu covers all drugs in Amazon's API testing requirements.

Brands should ask any provider for the full list of compounds screened, the detection level for each, and how findings are reported. A screen of 50 compounds and a screen of 450 compounds can both be described as "banned substance testing," and the difference matters for athlete-facing products.

Stability Testing and Shelf Life

Stability testing measures how potency, microbial quality, and physical properties change over time in the final package. FDA's Part 111 rule does not require an expiration date on supplements. The preamble to the 2007 final rule (72 FR 34856) is direct on this point. FDA wrote: "if you use an expiration date on a product, you should have data to support that date." FDA also recommended a written stability testing program to set storage conditions and expiration dates.

Industry practice, drawn from pharmaceutical guidelines, uses real-time storage at about 25°C and 60 percent relative humidity, with accelerated storage at 40°C and 75 percent relative humidity. Accelerated data can support a provisional date at launch while real-time data accumulate. Each time point typically records potency, microbial quality, and physical appearance.

What Amazon Requires Before Listing

Amazon's dietary supplement policy requires every supplement to be manufactured in a facility with a current third-party cGMP audit or certification. The audit must cover 21 CFR 111 and 117 or an accepted equivalent. FDA inspections, first-party audits, and consulting audits do not satisfy this requirement. Accepted programs listed by Amazon include NSF/ANSI 455-2, Eurofins, UL, USP, SGS, and several GFSI-benchmarked food safety schemes.

For products intended for bodybuilding, joint health, sexual enhancement, sports nutrition, or weight management, Amazon adds product testing. The policy states these products must be tested for heavy metals and microbial contaminants, and may be tested for pesticides based on their components. They must also contain dietary ingredients within the tolerances in 21 CFR 101.36 and 101.9(g). Finally, they must be tested for known adulterants under NSF/ANSI 173-2024 section 5.3.5.

Documents go through an Amazon-authorized testing, inspection, and certification (TIC) provider rather than directly to Amazon. Independent lab testing is acceptable but it needs to be reviewed by a TIC.

Certification programs can shorten this process. BSCG reports that Amazon has reviewed its Certified Drug Free and Certified Quality programs. Certified products are fast-tracked through Amazon's compliance process under BSCG's Compliance Fast Track. The Compliance Fast Track is available to general supplements, high risk categories must go through a TIC. Inclusion of any program here does not constitute an endorsement; brands should confirm current acceptance directly with Amazon.

Where Each Test Fits in the Production Timeline

Testing is most efficient when it is matched to the stage where a failure can still be corrected cheaply.

1. Formulation review. Before purchasing, screen every ingredient against FDA warning letters, the Amazon prohibited ingredient list, and advisory lists for unlawful or sport-banned compounds. Amazon's policy names specific peptides such as BPC-157 and GLP-1 agonists as prohibited.
2. Raw material receipt. Identity on every dietary ingredient lot, plus contaminant testing on at-risk materials or a qualified supplier COA covering those items.
3. Pilot or first production lot. Full finished-product panel. This lot also starts the stability study and produces the documents Amazon and certification programs will ask for.
4. Routine production. Release testing per the finished-product specification and sampling plan. Drug screening on every lot for athlete-facing or high-risk categories.
5. Post-launch. Annual re-verification of label claims and contaminants, stability pull points, and periodic off-the-shelf testing.

The first two stages are where problems are cheapest to correct. The contamination risk controls documented by BSCG emphasize supplier qualification, cross-contamination review of shared equipment, and raw material testing before blending.

Choosing a Laboratory and Reading the Certificate of Analysis

The laboratory should hold ISO/IEC 17025 accreditation with the relevant tests on its accreditation scope. 21 CFR Part 111 does not mandate this accreditation. Amazon's policy, however, links to the ISO/IEC 17025 standard as its reference and states that results from non-authorized labs must be validated by an authorized TIC provider. Accreditation demonstrates method validation, equipment calibration, and measurement traceability.

A complete certificate of analysis should show:

• Product name, lot number, and sample description
• Laboratory name, address, and accreditation number
• The method used for each test and its reporting or detection limit
• Quantitative results in the same units as the label
• The specification or limit applied, and a pass or fail against it
• Test date, analyst review, and authorized signature

A COA that reports "pass" without a numeric result, or "not detected" without a detection limit, does not allow the brand to judge how close the product sits to its limit. 21 CFR 111.75(a)(2)(ii) requires that any supplier COA used in place of testing include the method, its limits, and the actual results.

Lot Testing Versus Third-Party Certification

A laboratory test report answers a question about one sample, for the analytes ordered, on the date tested. It does not extend to future lots or to compounds outside the ordered scope. Certification adds a review of the formula, label, manufacturing facility, and quality documents, along with repeated testing under defined rules. BSCG describes this distinction in detail in its comparison of supplement testing and certification.

Certification programs in the sport space include BSCG Certified Drug Free, NSF Certified for Sport, Informed Sport, Informed Choice, the Cologne List, and HASTA. Screening menus, testing frequency, and audit requirements differ between programs. A brand comparing programs should request each provider's compound list, detection levels, lot testing frequency, and the organizations that formally recognize the program.

BSCG documents its recognition, including by the NFL, UFC, and the U.S. Department of Defense's Operation Supplement Safety, on its global recognition page. Listing a program here does not constitute a recommendation.

For a new brand, the practical sequence is usually lot testing first, then certification once the formula, supplier base, and manufacturer are settled. Certification requires the same documents a brand needs anyway: formula sheet with suppliers, ingredient and finished-product specifications, example COAs, master manufacturing record, and batch records. BSCG's certification process page lists these items as the standard intake package.

Frequently Asked Questions

Is nutraceutical testing legally required before selling a supplement in the U.S.?

Yes, in part. 21 CFR Part 111 requires identity testing of every dietary ingredient lot and verification that finished batches meet written specifications for identity, purity, strength, composition, and contaminant limits, without naming specific analytes or limits. Banned substance screening is not mandated by Part 111 but is required by Amazon for certain categories and by many sport programs. Stability studies are not mandated either, but FDA has stated that any expiration date on the label should be supported by data.

Which nutraceutical tests can a brand skip if the contract manufacturer already tests?

A brand can rely on the manufacturer's testing if it has reviewed the manufacturer's specifications, methods, and results and the manufacturer holds a current third-party GMP audit. The brand owner remains legally responsible for the product it labels and distributes. Independent confirmation testing on the first lots, and periodic off-the-shelf testing afterward, is common practice for brands that do not manufacture in-house.

How much does pre-launch supplement testing cost?

Costs vary by formula complexity, the number of analytes, and the laboratory. Label claim work on multi-ingredient formulas, broad pesticide panels, and banned substance screens of several hundred compounds involve more analytes than a single heavy metals or microbial panel. Stability studies add cost because they require testing at multiple time points over months. Brands should request itemized quotes that list each analyte and method.

What heavy metal limits apply to dietary supplements?

There is no single federal limit for all supplements. USP <2232> provides permitted daily exposures for arsenic, cadmium, lead, and mercury that many manufacturers adopt as specifications. California's Proposition 65 sets a lead Maximum Allowable Dose Level of 0.5 mcg/day that triggers a warning requirement. Individual USP monographs and NSF/ANSI 173 also contain limits for specific ingredients.

Do banned substance tests need to be run on every lot?

For products marketed to athletes or sold in high-risk categories, every-lot testing is the practice of the major sport certification programs. BSCG Certified Drug Free tests every finished-product lot, and Informed Sport states it tests each batch before release. Contamination can be lot-specific because it results from shared equipment or a single adulterated raw material shipment. A clean result on one lot does not demonstrate that the next lot is clean.

How long does pre-launch testing take?

Turnaround varies by laboratory and panel, so brands should confirm timelines when requesting quotes. Stability testing is the longest step. Industry protocols pull samples at several time points, often 0, 1, 3, 6, 9, and 12 months, and real-time studies continue for the full labeled shelf life. Accelerated data are used alongside real-time data rather than in place of them.

Summary

A complete pre-launch nutraceutical testing program covers identity, label claim, heavy metals, and microbial contaminants. Where the formula and market call for them, it adds pesticides, residual solvents, mycotoxins, banned substances, and stability. FDA's Part 111 rule sets the baseline: identity on every ingredient lot and finished-product verification against written specifications. Amazon's policy and sport-related recognition programs add heavy metals, microbial, adulterant, and in some cases pesticide testing on top of that baseline.

Two distinctions carry the most weight. Raw material testing and finished product testing answer different questions, and a program needs both. A lot test report and a certification also answer different questions; the first describes one sample, the second describes an ongoing system. Testing scopes, detection levels, and acceptance limits vary by laboratory and program, so the brand's specification, not the lab's default panel, should define what "pass" means.