1 Amino Club 9.5/10 3 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.91 Verified (opens in new tab) ILS Laboratories Tier B+ 8.08 Strong $3.00 $29.99 / 10mg Shop → Amino Club (opens in new tab) 2 Modern Aminos 9.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.94 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 7.88 Strong $4.10 $41.00 / 10mg Shop → Modern Aminos (opens in new tab) 3 S1Research 9.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.94 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 7.70 Strong $2.00 $20.00 / 10mg Shop → S1Research (opens in new tab) 4 Protide Health 9.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.93 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 7.67 Strong $5.50 $55.00 / 10mg Shop → Protide Health (opens in new tab) 5 Bluum Peptides 9.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.94 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 7.48 Strong $3.50 $35.00 / 10mg Shop → Bluum Peptides (opens in new tab) 6 Southern Aminos 9.0/10 3 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.53 Verified (opens in new tab) ILS Laboratories Tier B+ 8.09 Strong $4.40 $44.00 / 10mg Shop → Southern Aminos (opens in new tab) 7 Loti Labs 9.0/10 3 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.9 Verified (opens in new tab) Bioviridian Tier A- 7.79 Strong $4.00 $39.99 / 10mg Shop → Loti Labs (opens in new tab) 8 LabFirst Peptides 9.0/10 3 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.669 Verified (opens in new tab) Kovera Labs Tier A- 7.73 Strong $4.00 $40.00 / 10mg Shop → LabFirst Peptides (opens in new tab) Copy PSR10 copied (10% off, affiliate) 9 Verified Peptides 9.0/10 3 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.719 Verified (opens in new tab) Janoshik Analytical Tier B+ 7.67 Strong $3.50 $34.99 / 10mg Shop → Verified Peptides (opens in new tab) 10 Ascension Peptides 9.0/10 3 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.263 Verified (opens in new tab) Kovera Labs Tier A- 7.55 Strong $4.90 $49.00 / 10mg Shop → Ascension Peptides (opens in new tab) Copy PSR50 copied (50% off, affiliate) 11 Peptides Source 9.0/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.769 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 7.33 Strong $5.00 $50.00 / 10mg Shop → Peptides Source (opens in new tab) 12 BioLongevity Labs 9.0/10 3 base, +2 MDx BioAnalytical Laboratory tier A+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0 accreditation (tested 2026-04-27, before 2026-06-09), +0.5 purity 99.76 Verified (opens in new tab) MDx BioAnalytical Laboratory Tier A+ 7.24 Strong $9.59 $47.97 / 5mg Shop → BioLongevity Labs (opens in new tab) Copy PSR copied (15% off, affiliate) 13 Zeptix Labs 8.5/10 3 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.92 Verified (opens in new tab) Accumark Labs Tier B+ 8.17 Strong $4.50 $44.99 / 10mg Shop → Zeptix Labs (opens in new tab) Copy PSR20 copied (20% off, affiliate) 14 Luv Aminos 8.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.92 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 7.90 Strong $3.00 $30.00 / 10mg Shop → Luv Aminos (opens in new tab) Copy PEPTIDESOURCEREVIEW copied (10% off, affiliate) 15 Pure Health Peptides 8.5/10 3 base, +2 Ethos Analytics Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99 Verified (opens in new tab) Ethos Analytics Laboratory Tier B+ 7.88 Strong $2.40 $24.00 / 10mg Shop → Pure Health Peptides (opens in new tab) 16 Amino USA 8.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.959 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 7.78 Strong $4.50 $45.00 / 10mg Shop → Amino USA (opens in new tab) 17 Direct Peptides 8.5/10 3 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.25 Verified (opens in new tab) Horizon Analytical Tier A- 7.43 Strong $8.90 $89.00 / 10mg Shop → Direct Peptides (opens in new tab) 18 Oasis Labs 8.5/10 3 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.9 Verified (opens in new tab) Bioviridian Tier A- 7.30 Strong $3.60 $36.00 / 10mg Shop → Oasis Labs (opens in new tab) 19 Kyreon 8.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.79 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 7.29 Strong $4.30 $43.00 / 10mg — 20 Onyx Biolabs 8.5/10 3 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.635 Verified (opens in new tab) Kovera Labs Tier A- 7.29 Strong $3.90 $38.99 / 10mg Shop → Onyx Biolabs (opens in new tab) 21 Pacific Edge Labs 8.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.95 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 7.15 Strong $5.00 $49.95 / 10mg Shop → Pacific Edge Labs (opens in new tab) 22 Paramount Peptides 8.5/10 3 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.87 Verified (opens in new tab) Janoshik Analytical Tier B+ 7.12 Strong $5.95 $59.50 / 10mg Shop → Paramount Peptides (opens in new tab) 23 StudzPeptides 8.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.92 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 7.10 Strong $2.50 $24.99 / 10mg Shop → StudzPeptides (opens in new tab) 24 Sports Technology Labs 8.5/10 3 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.9 Verified (opens in new tab) MZ Biolabs Tier A 6.88 Fair $2.60 $25.99 / 10mg Shop → Sports Technology Labs (opens in new tab) 25 Rogue Compounds 8.5/10 3 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.94 Verified (opens in new tab) ILS Laboratories Tier B+ 6.86 Fair $6.50 $64.99 / 10mg Shop → Rogue Compounds (opens in new tab) 26 FRO Peptides 8.5/10 3 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.92 Verified (opens in new tab) Accumark Labs Tier B+ 6.67 Fair $4.10 $40.99 / 10mg Shop → FRO Peptides (opens in new tab) 27 Profound Aminos 8.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.91 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 6.65 Fair $5.50 $55.00 / 10mg Shop → Profound Aminos (opens in new tab) 28 Peptyes 8.5/10 3 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.2 Verified (opens in new tab) Horizon Analytical Tier A- 6.55 Fair $4.50 $45.00 / 10mg Shop → Peptyes (opens in new tab) 29 JD BioWorks 8.5/10 3 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.89 Verified (opens in new tab) ILS Laboratories Tier B+ 6.34 Fair $6.50 $64.95 / 10mg Shop → JD BioWorks (opens in new tab) Copy PSR10 copied (10% off, affiliate) 30 NextSelf Labs 8.5/10 3 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.93 Verified (opens in new tab) ILS Laboratories Tier B+ 6.26 Fair $5.00 $49.99 / 10mg Shop → NextSelf Labs (opens in new tab) 31 GhostLabz 8.5/10 3 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.93 Verified (opens in new tab) ILS Laboratories Tier B+ 6.14 Fair $4.50 $44.99 / 10mg Shop → GhostLabz (opens in new tab) 32 Research Peptides Lab 8.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.946 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 6.14 Fair $5.50 $55.00 / 10mg Shop → Research Peptides Lab (opens in new tab) 33 Hello Stacks 8.5/10 3 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.35 Verified (opens in new tab) Vanguard Laboratory Tier B+ 6.08 Fair $4.90 $49.00 / 10mg Shop → Hello Stacks (opens in new tab) Copy PSR25 copied (25% off, affiliate) 34 Bionova Peptides 8.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.92 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 6.03 Fair $4.00 $39.99 / 10mg Shop → Bionova Peptides (opens in new tab) 35 Peptide Pro 8.5/10 3 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.9 Verified (opens in new tab) Bioviridian Tier A- 5.62 Fair $5.10 $51.00 / 10mg Shop → Peptide Pro (opens in new tab) 36 Azyrion Labs 8.5/10 3 base, +2 ACS Laboratory tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.98 Verified (opens in new tab) ACS Laboratory Tier A 5.40 Weak $4.29 $42.95 / 10mg Shop → Azyrion Labs (opens in new tab) 37 Swiss Chems 8.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.95 Verified (opens in new tab) Freedom Diagnostics Testing Tier A 5.39 Weak $5.00 $49.99 / 10mg Shop → Swiss Chems (opens in new tab) Copy idjfdqaz copied (10% off, affiliate) 38 NuuVive Peptides 8.0/10 3 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, no purity figure Verified (opens in new tab) Janoshik Analytical Tier B+ 6.93 Fair $5.10 $51.00 / 10mg Shop → NuuVive Peptides (opens in new tab) 39 Core Peptides 8.0/10 3 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.26 Verified (opens in new tab) Vanguard Laboratory Tier B+ 6.54 Fair $4.30 $43.00 / 10mg Shop → Core Peptides (opens in new tab) 40 NextGen Peps 8.0/10 3 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.653 Verified (opens in new tab) Janoshik Analytical Tier B+ 5.95 Fair $4.30 $43.00 / 10mg Shop → NextGen Peps (opens in new tab) Copy PSR10 copied (10% off, affiliate) 41 Biotech Peptides 8.0/10 3 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.45 Verified (opens in new tab) MZ Biolabs Tier A 5.79 Fair $4.50 $45.00 / 10mg Shop → Biotech Peptides (opens in new tab) 42 Raw Amino 8.0/10 3 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.45 Verified (opens in new tab) MZ Biolabs Tier A 5.59 Fair $5.10 $51.00 / 10mg Shop → Raw Amino (opens in new tab) 43 Cernum Biosciences 8.0/10 3 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.597 Verified (opens in new tab) Janoshik Analytical Tier B+ 4.68 Weak $4.50 $44.99 / 10mg Shop → Cernum Biosciences (opens in new tab) 44 Prime Peptide Solutions 7.0/10 3 base, +2 BT Labs tier B, +1.5 key, +0.5 purity 99.9 View (opens in new tab) BT Labs Tier B 7.14 Strong $4.50 $44.99 / 10mg Shop → Prime Peptide Solutions (opens in new tab) 45 AminoVault 7.0/10 3 base, +2 Krause Analytical LLC tier B-, +1.5 key, +0.5 purity 99.9 Verified (opens in new tab) Krause Analytical LLC Tier B- 5.78 Fair $4.67 $46.75 / 10mg Shop → AminoVault (opens in new tab) Copy VVBMFBGTOU copied (5% off, affiliate) 46 Ageless Peptides 7.0/10 3 base, +2 Vanguard Laboratory tier B+, +1.5 key, +0.5 endotoxin, 0 purity 99.19 View (opens in new tab) Vanguard Laboratory Tier B+ 4.36 Weak $5.00 $49.99 / 10mg Shop → Ageless Peptides (opens in new tab) 47 Modified Aminos 6.5/10 3 base, +2 Ethos Analytics Laboratory tier B+, +1.5 key, no purity figure View (opens in new tab) Ethos Analytics Laboratory Tier B+ 6.75 Fair $3.00 $29.99 / 10mg Shop → Modified Aminos (opens in new tab) Copy PSR copied (10% off, affiliate) 48 VoriLabs 5.5/10 3 base, +2 Krause Analytical LLC tier B-, +0.5 purity 99.9 View (opens in new tab) Krause Analytical LLC Tier B- 6.87 Fair $5.00 $49.99 / 10mg Shop → VoriLabs (opens in new tab) 49 Prime Lab Peptides 5.5/10 3 base, +2 Freedom Diagnostics Testing tier A, +0.5 purity 99.94 View (opens in new tab) Freedom Diagnostics Testing Tier A 6.47 Fair $5.00 $50.00 / 10mg Shop → Prime Lab Peptides (opens in new tab) 50 Vyal Labs 5.5/10 3 base, +2 Accurate Test Lab tier B-, +0.5 purity 99.94 View (opens in new tab) Accurate Test Lab Tier B- 4.59 Weak $7.90 $79.00 / 10mg Shop → Vyal Labs (opens in new tab) 51 Redline Bio Labs 5.0/10 3 base, +2 AV Analytics tier A-, no purity figure View (opens in new tab) AV Analytics Tier A- 4.80 Weak $5.20 $52.00 / 10mg Shop → Redline Bio Labs (opens in new tab) 52 Based Research 5.0/10 3 base, +0 Analytical Formulations tier C, +1.5 key, +0.5 purity 99.9 View (opens in new tab) Analytical Formulations Tier C 4.54 Weak $7.50 $75.00 / 10mg Shop → Based Research (opens in new tab) 53 Peptide Warehouse 2.0/10 no laboratory named on the certificate = 2.0 flat Vendor report (lab not established) (opens in new tab) Third-party lab (undisclosed) 5.01 Weak $4.40 $43.99 / 10mg Shop → Peptide Warehouse (opens in new tab) 54 PSPeptides 2.0/10 North American Diagnostics tier D: independence not established = 2.0 flat Vendor report (lab not established) (opens in new tab) North American Diagnostics Tier D 3.95 Poor $4.50 $44.99 / 10mg Shop → PSPeptides (opens in new tab) 55 Prism Labs 2.0/10 Proof Point Analytical tier D: independence not established = 2.0 flat Vendor report (lab not established) (opens in new tab) Proof Point Analytical Tier D 3.92 Poor $4.50 $44.99 / 10mg Shop → Prism Labs (opens in new tab) 56 Peptide.Express 2.0/10 Mistral Diagnostics tier D: independence not established = 2.0 flat Vendor report (lab not established) (opens in new tab) Mistral Diagnostics Tier D 3.90 Poor $5.50 $55.00 / 10mg Shop → Peptide.Express (opens in new tab) 57 Peptara Labs 2.0/10 Titreon Analytical tier D: independence not established = 2.0 flat Vendor report (lab not established) (opens in new tab) Titreon Analytical Tier D 2.38 Poor $14.00 $140.00 / 10mg Shop → Peptara Labs (opens in new tab) 58 Arctic Lab Supply 0.0/10 no certificate None No third-party COA was publicly available at audit time — 7.09 Strong Not listedPT-141 10mg is listed in the store as a pre-order on 2026-11-02 (structured data availability PreOrder; the page says it ships by Friday 13 November 2026); it is orderable, so it is carried, and like an out-of-stock size it is not priced until it is in stock. The page was not in the store's sitemap archived on 24 October 2026. Nothing was added to a cart. Shop → Arctic Lab Supply (opens in new tab) Copy PSRINFO copied (25% off, affiliate) 59 Delix Labs 0.0/10 no certificate None No third-party COA was publicly available at audit time — 4.52 Weak $4.90 $49.00 / 10mg Shop → Delix Labs (opens in new tab) 60 GenX Bio 0.0/10 no certificate None No third-party COA was publicly available at audit time — 4.39 Weak $4.00 $40.00 / 10mg Shop → GenX Bio (opens in new tab) 61 Lotus Peptide 0.0/10 no certificate None No third-party COA was publicly available at audit time — 3.74 Poor $3.00 $30.00 / 10mg Shop → Lotus Peptide (opens in new tab) 62 Peptide Labs 0.0/10 no certificate Login-gated COAs are provided but sit behind the vendor's login wall — 3.72 Poor $4.50 $44.99 / 10mg Shop → Peptide Labs (opens in new tab) 63 Peptide Pros 0.0/10 no certificate None No third-party COA was publicly available at audit time — 3.56 Poor $3.75 $37.50 / 10mg Shop → Peptide Pros (opens in new tab) 64 Spartan Peptides 0.0/10 no certificate None No third-party COA was publicly available at audit time — 3.32 Poor $13.90 $139.00 / 10mg Shop → Spartan Peptides (opens in new tab) 65 Drexa Labs 0.0/10 no certificate None No third-party COA was publicly available at audit time — 3.28 Poor $4.50 $45.00 / 10mg Shop → Drexa Labs (opens in new tab) 66 Stack Research 0.0/10 posted copy differs from the lab's copy = 0 View COA (differs from lab copy) (opens in new tab) Accumark Labs Tier B+ 2.49 Poor Not listedPT-141 10 mg is shown 'Out of stock' on the product page and is absent from the Store API catalogue on 2026-11-01; the product is still listed, so it is carried, but an out-of-stock size is not priced. Price is the single-vial price a buyer pays on 2026-11-01 (WooCommerce Store API and product page): every product is on an undated sale that is not tied to an event or season, so under rule E the sale price is the price at this first review and the higher regular price in the Store API is not used. Not counted (rule E1): the sitewide code STACK20, the first-order email code, the automatic volume pricing at 3, 5 and 10 vials, and the 3-item and 5-item Stack Builder discounts, which need a code or more than one vial. Shop → Stack Research (opens in new tab) 67 Peptide Warehouse US 0.0/10 no certificate None No third-party COA was publicly available at audit time — 2.46 Poor $4.20 $420.00 / 10 x 10mg pack Shop → Peptide Warehouse US (opens in new tab) 68 Welon Peptide Solutions 0.0/10 no certificate None No third-party COA was publicly available at audit time — 2.13 Poor $0.89 $89.00 / 10 x 10mg pack Shop → Welon Peptide Solutions (opens in new tab) 69 Medura Peptides 0.0/10 no certificate None No third-party COA was publicly available at audit time — 1.63 Poor $5.40 $53.99 / 10mg Shop → Medura Peptides (opens in new tab)