How Project Biohacking Rates Research Peptide Vendors

1. Opening section

Every vendor in the Project Biohacking directory carries a rating out of five. This page explains exactly how that number is produced, what evidence goes into it, and what does not.

We publish this for one reason: we earn affiliate commission from the vendors we rate. That is a conflict of interest, and the only meaningful response to it is to make the scoring method checkable. Everything below can be verified against the vendor pages on this site and against the vendors' own published documentation.

The rating measures documentation quality, business accountability, and operational reliability. It does not measure whether any compound is safe, effective, or suitable for any use in humans or animals. All products discussed on this site are research materials sold for laboratory use only.

2. The four scoring layers

Vendors are scored out of 100 points across four layers. The total is divided by 20 to produce the published five-star value, shown to one decimal place.

A tenure modifier of plus or minus 5 points is then applied to the total, described in section 4c. The final Standards Score is clamped to a range of 0 to 100.



Analytical documentation carries half the total because it is the only layer that speaks to whether the material in the vial is what the label says.

3. Layer 1: Analytical documentation (50 points)

Why purity earns no points

Every vendor in this market publishes a purity figure, and almost all of them report 99% or higher. A number that everyone reports at the same level cannot distinguish between them.

Purity and identity testing are therefore an entry requirement, not a scored credit. A vendor that cannot document both is not listed in the directory at all. What we score is everything a vendor documents beyond those two.

3a. Non-purity assay breadth (16 points)

Points are awarded for each distinct assay type reported on the lot certificate, counting only these:

• Bacterial endotoxin (USP 85 or LAL)
• Sterility or microbial contamination (USP 71)
• Elemental impurities and heavy metals
• Residual solvents
• Water content (Karl Fischer)
• Counter-ion content (TFA or acetate)
• Adulterant screening (fentanyl presence analysis or equivalent)
  

A tenure modifier of plus or minus 5 points is then applied to the total, described in section 4c. The final Standards Score is clamped to a range of 0 to 100.



Analytical documentation carries half the total because it is the only layer that speaks to whether the material in the vial is what the label says.

The curve flattens deliberately. Going from zero additional assays to one is a larger change in what a buyer knows than going from five to six.

On adulterant screening. Research compounds in this category move through supply chains that are not subject to pharmaceutical chain-of-custody controls. A certificate that confirms no fentanyl or comparable adulterant is present addresses a contamination risk that purity testing does not detect, since a purity figure describes the proportion of intended compound and says nothing about what the remainder consists of. Very few laboratories in this market run this screen at all.

Critical rule: a process claim is not a documented assay. A vendor describing a purification step, a manufacturing standard, or an ingredient sourcing arrangement is describing a process. That earns credit under section 3e, not here. Only a reported result on a lot certificate counts as an assay.

3b. Laboratory independence and credentials (14 points)

Blind submission is scored separately because it removes a route for a laboratory to favor a known client. It is a stronger design than accreditation alone.

Two laboratories checking the same lot is scored well above two laboratories used across different batches. Only the first provides a genuine independent check, since both instruments examine identical material and a discrepancy between them is detectable. Sequential coverage of different batches by different laboratories is useful but cannot catch a bad result on any individual lot.



Manufacturing and process control drops to 2 points and third-party testing program participation drops to 2 points to accommodate this, keeping Layer 1 at 50.

3c.  Certificate granularity (8 points)

3d. Certificate accessibility and verifiability (8 points)

The top tier is reserved for documentation a buyer can verify without relying on the vendor to hand it over, because the vendor is not the party being checked.

3e.Manufacturing and process control (2 points)

Documented in-house synthesis, counter-ion exchange or equivalent purification steps, GMP-compliant contract manufacturing, or an FDA-registered ingredient source. These are supply-chain and process claims. They are scored because they are meaningful, and scored lightly because they are vendor assertions rather than independently reported measurements.

3f. Third-party testing program participation (2 points)

Results published through independent testing programs outside the vendor's own certificate chain.

This is capped at 3 points deliberately. Several of these programs operate on a pay-to-participate basis, meaning participation is purchased. That selects for vendors who can afford the fee and expect a favorable result, so the signal is weaker than its visibility suggests.

4. Layer 2: Ownership and accountability (20 points, plus tenure modifier)

In a market where vendors can operate anonymously, knowing who is behind a business determines whether anyone is answerable when an order goes wrong.

4a. Identity disclosure (12 points, highest applicable tier only)

The negative score is intentional. A vendor with no verifiable business identity carries a deficit into the rest of the model rather than simply scoring zero.

4b. Public accountability (8 points)

Whether identified leadership is verifiably attached to the business in public: author profiles, published work, named commentary in trade press, or membership in an industry body that lists members publicly.

4c.Operating tenure modifier (plus or minus 5 points)

This industry is young. Most vendors in this category have been trading for a few years, and one of the longest-established names in it closed in March 2026. Applying tenure thresholds borrowed from mature industries would place every vendor at the floor and measure nothing.

Tenure is therefore measured against the average tenure of all vendors in this directory, which is {MEAN TENURE} as of the last scoring pass. Vendors above the average gain points, vendors below it lose points, and a vendor at the average is neither rewarded nor penalized.

This is applied as a modifier to the Standards Score total rather than as a component inside a layer, because it can move in either direction.

The average is held fixed between annual reviews rather than recalculated whenever a vendor is added or removed, so that a rating does not move for reasons unrelated to the vendor's own conduct.

A disclosed rebrand is not entity rotation. A vendor that publicly states a former trading name and continues on the same domain with the same catalog is showing continuity, not concealing it. Moving quietly between corporate entities or domains is the pattern this penalizes.

5. Layer 3: Commercial and operational (20 points)

What is deliberately not scored here

Catalog access controls are not penalized. A number of vendors now require an account to browse pricing or products. This increasingly reflects payment processing and regulatory pressure rather than a vendor's own quality standards, and scoring vendors down for constraints imposed on them by acquirers and processors would measure the wrong thing.

We still disclose it. Where a vendor requires login before you can see the catalog, the vendor's review page says so, because it changes your experience even though it does not change the rating.

6. Layer 4: Community track record (10 points)

6a. Normalized complaint profile (6 points)

Raw review scores are not aggregated into our rating. Platforms that allow vendors to solicit reviews automatically at the point of purchase measure how systematically a vendor asks for reviews as much as they measure satisfaction. A vendor that emails every completed order will accumulate a higher score than an equally good vendor that does not, and comparing the two directly rewards the marketing operation rather than the business.

Instead, complaints are read against two adjustments.

Base-rate normalization. Complaint rates are compared against the observable rate across this product category rather than against an absolute standard. Research peptides are bought by a population that includes many people new to handling lyophilized material, and the category's baseline complaint pattern reflects that. A vendor is assessed against its peers, not against a general retail benchmark.

Root-cause categorization. Complaints are sorted before they are counted:

A negative review describing a reconstitution mistake tells you something about the buyer's experience level. It does not tell you anything about the vendor. A negative review describing an unanswered support ticket does.

We also weight recent reports more heavily than older ones, because a vendor's operations two years ago may not describe how it runs today.

6b. Review authenticity checks (2 points)

Review sets are assessed for patterns that indicate coordinated posting rather than organic feedback: clusters posted within a single day, reviewer accounts with no other review history, near-identical phrasing across multiple entries, volume spikes unconnected to a product launch or promotion, and platform-flagged entries.

We apply these checks to inform our own scoring. We do not publish allegations about any named company's review practices.

6c. Regulatory record (2 points)

Publicly listed regulatory actions, including FDA warning letters, checked at each review cycle.

7. The two numbers we publish

Every vendor page carries two figures. They answer different questions and neither is useful without the other.

The Standards Score is absolute. It is the 100-point total from the four layers above, measured against the complete standard described in section 7b. It does not move when other vendors change. It answers: how close is this vendor to what a research peptide supplier should document?

The star rating is relative. It places a vendor against the other vetted vendors in this directory. It answers the question a buyer actually has, which is not "is this vendor perfect" but "of the suppliers I can actually order from, where does this one stand?"

We publish both because either one alone misleads. A star rating on its own hides how far the category is from where it should be. A Standards Score on its own tells a reader nothing about which of nine real vendors to choose.

7a. How the star rating is calculated

Stars are indexed across the directory field:

Stars = 2.5 + 2.5 × (Vendor Score − Field Floor) ÷ (Field Leader − Field Floor)

{FIELD LEADER} and {FIELD FLOOR} are the highest and lowest Standards Scores in the directory at the last full scoring pass. Both are held fixed and reviewed annually, so a rating does not move because a different vendor was added or removed.

Absolute ceilings then apply. These prevent the relative scale from awarding a high rating to the best of a weak field:

If every vendor in this market scored poorly, the ceilings would pull the whole star scale down with them. The relative axis cannot be gamed by grading the field against itself.

7b. What a five-star vendor looks like

This is the standard the Standards Score measures against. No vendor currently in this directory meets it.

Analytical documentation

• Lot certificates reporting purity, identity, endotoxin, sterility, heavy metals, residual solvents, and counter-ion content
• Testing by a named, independent laboratory holding active ISO/IEC 17025 accreditation
• Samples submitted blind, with the manufacturer withheld from the laboratory
• A second independent laboratory used for confirmatory work
• Certificates specific to the lot shipped, with identifiers searchable on the testing laboratory's own domain and no account required
• GMP-compliant contract manufacturing from an FDA-registered ingredient source

Ownership and accountability

• Named leadership, publicly identifiable and verifiably attached to the business
• Registered corporate entity disclosed alongside the people
• Established tenure with no entity or domain rotation

Commercial and operational

• Shipping tiers with processing and transit times stated separately and accurately
• A return or replacement window stated in days
• Direct support channels with documented response times
• Multiple payment methods maintained

Community track record

• Complaint rate below the category baseline after root-cause sorting
• No coordinated review patterns
• Clean regulatory record

7c. Why no vendor meets it yet

Every requirement above is already being met by some vendor in this market. None has assembled them together.

This is a finding about the category, not a criticism of any one supplier. The standard is not theoretical and it is not out of reach. It describes a vendor that could exist as soon as one operator combines practices its competitors already run.

8. Directory entry requirements and disqualifiers

A vendor is not listed, regardless of any other score, where any of the following apply:

• No purity or identity documentation available at any level
• Therapeutic, curative, or human-use claims made in marketing
• Documented history of moving between corporate entities or domains without disclosure
• Refusal to identify the testing laboratory

9. Conflict of interest

Project Biohacking earns affiliate commission on purchases made through links and coupon codes on this site. That relationship funds the free calculators, guides, and reviews.

It does not set the ratings. Our lowest-rated directory vendor is an affiliate partner, and the reasons for that rating are stated plainly on its review page alongside the affiliate disclosure.

Ratings are reviewed on a fixed schedule and whenever a vendor materially changes its testing, ownership, or policies. Where a re-score moves a rating down, the page is updated to reflect it.

Research Peptide Vendor FAQ