Frequently asked questions.

No. We have never sold peptides and do not plan to. Every shop listed is an independent seller - we simply publish data about them.

No ads, no sponsorships, no affiliate commissions. No shop can pay to change their score or move up rankings. Future monetization will come from optional shop tools that do not affect rankings.

The Trust Score is a number from 0 to 100 calculated from two data inputs: the average community review rating and the average HPLC purity percentage from independent lab tests. Lab test data carries 60% weight; community reviews carry 40% weight. Lab purity weighs more because HPLC analysis provides objective, verifiable quality data. The score also scales by data confidence — shops with more reviews and lab tests carry more weight than shops with only one or two data points. This prevents low-volume shops from gaming the rankings with cherry-picked data. Once a shop accumulates roughly 20 combined data points, the scaling caps and the underlying data dominates. Shops with no reviews and no lab tests display a Provisional label. The full methodology is on the General Rules page.

The Trust Score moved from a 0–5 scale to a 0–100 scale to better differentiate shops at the top end. On the old scale, the difference between a 4.7 and a 4.9 looked small, but represented a meaningful gap in data quality. The 0–100 scale makes those differences clearer (e.g., 88 vs 95). The underlying formula still combines reviews (40%) and lab purity (60%) — just on a wider numerical range that's easier to read at a glance.

Each shop review includes 5 sub-ratings on a 1–5 scale: Overall (general satisfaction), Quality (product purity and consistency), Delivery (shipping speed and packaging), Service (customer support responsiveness), and Pricing (value for money). These sub-ratings are averaged separately and displayed as rating bars on each shop page. Each review also includes a 'Would buy again' indicator (yes/no) and free-text descriptions for each sub-rating.

Each review includes a yes/no answer to 'Would you buy from this shop again?' The percentage shown on each shop profile is the share of reviewers who answered yes. This metric is tracked separately from star ratings because buyers sometimes give a 5-star review but say no to buying again (e.g., one-time need for a specific compound), or give a 3-star review but say yes (e.g., minor issues outweighed by good value).

A 'Lab Verified ✓' label means the shop has at least one independent lab test in the Peptigrity database. The Trust Score for that shop combines review ratings (40% weight) and lab-verified purity data (60% weight). Shops without lab tests display 'Reviews Only,' indicating the score is based on community feedback alone. Shops with no reviews and no lab tests display 'Provisional' until data accumulates.

A Provisional label appears on shops with no lab tests on file and fewer than 3 community reviews — the data isn't yet substantial enough to weight reliably. The Trust Score is shown with a disclosure that the data is limited. As reviews and lab tests accumulate, the shop transitions to either 'Reviews Only' or 'Lab Verified' status. Provisional is a data-volume indicator, not a quality judgment.

No. No shop can pay to modify, boost, or suppress their trust score. The scoring algorithm applies equally to every shop. Peptigrity does not accept advertising, sponsorship, or affiliate commissions from any listed shop.

Purity of 98% or higher is considered high quality. Purity between 95-97.9% is acceptable for most research purposes. Purity between 90-94.9% indicates noticeable impurities. Purity below 90% suggests significant quality issues.

Anyone - buyers, shop owners, independent researchers. Every test must come from a qualifying third-party lab with a verifiable Certificate of Analysis.

No. In-house testing by vendors is not accepted. All lab tests on Peptigrity must be performed by third-party testing laboratories with no financial relationship to the peptide shop whose product was tested. This is the key difference between Peptigrity's lab data and vendor-provided Certificates of Analysis published on shop websites — vendor-published CoAs can be cherry-picked or fabricated; third-party lab tests submitted independently cannot.

HPLC (High-Performance Liquid Chromatography) purity is the percentage of a sample that consists of the target peptide compound. A purity of 98% means 98% of the tested sample is the intended peptide, with 2% consisting of synthesis impurities, degradation products, or residual solvents.

Endotoxin testing measures bacterial contamination in peptide samples, reported in EU/mL. Elevated endotoxin levels in injectable products can cause fever, inflammation, and septic shock. The FDA sets limits at 5 EU/kg of body weight.

HPLC purity analysis costs $50-$180 per sample, endotoxin screening costs $30-$60, and quantity verification is often included with HPLC. A full panel typically costs $80-$150 total.

It gets published. We do not suppress unfavorable results. The shop is notified and may respond publicly.

Verified accounts with a confirmed purchase history. One review per shop per account.

Yes, within 24 hours of submission. While logged in, you'll see an Edit button on your own review card — you can update any field (ratings, comments, would-buy-again). After 24 hours the review is locked.

No. Once the 24-hour edit window closes, reviews are permanent. The only exception is if you posted to the wrong shop — contact us and we'll handle it case-by-case.

We remove reviews that violate 4 criteria: fake purchase, defamation, doxxing, or ToS violation. We do not remove reviews for being negative.

Go to /for-shops, search for your domain, and verify ownership via email on your contact page.

Yes. Claimed shops can post public responses threaded under each review.

Free.

No. Shops cannot pay for removal or request delisting. Once listed, the shop remains along with all reviews and lab test data. This policy protects the integrity of the review history.