Both vendors are vetted and approved by PeptidePrices. They tie at 8.5/10. American Peptides' basket costs $1,160.01 against $1,272.26 at UNYX Peptides after codes and it holds 114 COAs against 44, while UNYX is lower on 11 of 21 shared compounds. Pick American Peptides for certificate scope; pick UNYX Peptides for lower unit prices on those 11.
Key takeaways
- Price: UNYX Peptides is lower on 11 of 21 shared compounds and American Peptides on 9; American Peptides has the lower basket, $1,288.90 against $1,413.63 before codes and $1,160.01 against $1,272.26 after.
- COAs: American Peptides holds 114 COA records against 44 at UNYX Peptides.
- Reviews: American Peptides shows 4.3/5 on Trustpilot from 53 reviews. UNYX Peptides has no independent review profile on file.
- Shipping: American Peptides charges $13 for FedEx 2-day and ships free over $300; UNYX Peptides charges $20 for UPS 2-3 day, ships free over $200 and offers $60 overnight.
- Codes: JOHN105699 takes 10% off at American Peptides and peptideprices takes 10% off at UNYX Peptides; neither changes which vendor is lower.
- Who picks which: pick UNYX Peptides for GLP-2T and GLP-1S, where it is lower per standard amount; pick American Peptides if certificate scope matters most.
In this article
At a glance: two 8.5/10 scores, 114 certificates against 44
Both storefronts list United States shipping, and both reader codes take 10% off. Scores and certificate counts come from the American Peptides review and the UNYX Peptides review; prices come from the October 21, 2026 stock check.
| American Peptides | UNYX Peptides | |
|---|---|---|
| PeptidePrices score | 8.5/10 | 8.5/10 |
| Factor scores (COA / reputation / transparency / operations) | 9.5 / 6 / 9 / 9.5 | 9 / 7 / 8.5 / 8.5 |
| COA badge and quality | COA verified, 9.5/10 | COA verified, 9/10 |
| COA library records | 114 | 44 |
| In-stock listings / compounds | 53 / 37 | 43 / 22 |
| Reader code | JOHN105699 (10% off) | peptideprices (10% off) |
| Ships to | United States only | United States |
| Payment | Credit/debit card, Apple Pay | Credit/debit card |
| Base / founded | Shreveport, LA / 2026 | Arizona / not disclosed |
| Independent reviews | Trustpilot 4.3/5 (53) | None on file |
Which vendor is cheaper on the 21 compounds both stock?
The table uses each vendor's cheapest in-stock package per compound, normalized to the compound's standard research amount (price ÷ vial mg × standard mg). Coupon columns apply each 10% code. All 21 shared compounds have a normalized price on both sides, and every one is in the table.
| Compound | American Peptides packages | UNYX Peptides packages | American Peptides / standard | UNYX Peptides / standard | American Peptides after code | UNYX Peptides after code | Lower (before and after code) |
|---|---|---|---|---|---|---|---|
| BPC-157 | 5mg $60.00; 10mg $80.00; 15mg $100.00 | 5mg $40.00; 10mg $65.00 | $66.67/10mg | $65.00/10mg | $60.00 | $58.50 | UNYX Peptides |
| DSIP (Delta Sleep-Inducing Peptide) | 5mg $55.00 | 5mg $59.99 | $110.00/10mg | $119.98/10mg | $99.00 | $107.98 | American Peptides |
| GHK-Cu (Copper Peptide) | 50mg $50.00; 100mg $75.00 | 50mg $45.00; 100mg $65.00 | $7.50/10mg | $6.50/10mg | $6.75 | $5.85 | UNYX Peptides |
| GLOW | 70mg $150.00 | 70mg $130.00 | $21.43/10mg | $18.57/10mg | $19.29 | $16.71 | UNYX Peptides |
| Glutathione | 1500mg $170.00 | 1500mg $109.99 | $1.13/10mg | $0.73/10mg | $1.02 | $0.66 | UNYX Peptides |
| KLOW Protocol | 80mg $200.00 | 80mg $150.00 | $25.00/10mg | $18.75/10mg | $22.50 | $16.88 | UNYX Peptides |
| KPV | 10mg $60.00 | 10mg $89.99 | $60.00/10mg | $89.99/10mg | $54.00 | $80.99 | American Peptides |
| Melanotan-1 (MT-1) | 10mg $55.00 | 10mg $79.99 | $55.00/10mg | $79.99/10mg | $49.50 | $71.99 | American Peptides |
| Melanotan-2 (MT-2) | 10mg $55.00 | 10mg $69.99 | $55.00/10mg | $69.99/10mg | $49.50 | $62.99 | American Peptides |
| MOTS-c | 10mg $100.00; 40mg $160.00 | 10mg $60.00; 40mg $189.99 | $40.00/10mg | $47.50/10mg | $36.00 | $42.75 | American Peptides |
| PT-141 (Bremelanotide) | 10mg $60.00 | 10mg $74.99 | $60.00/10mg | $74.99/10mg | $54.00 | $67.49 | American Peptides |
| GLP-3R | 10mg $105.00; 20mg $200.00; 30mg $240.00; 60mg $400.00 | 5mg $75.00; 10mg $100.00; 15mg $109.99; 20mg $150.00; 30mg $200.00 | $66.67/10mg | $66.67/10mg | $60.00 | $60.00 | Tie |
| Selank | 10mg $65.00 | 5mg $35.00; 10mg $60.00 | $65.00/10mg | $60.00/10mg | $58.50 | $54.00 | UNYX Peptides |
| GLP-1S | 10mg $90.00; 20mg $160.00; 30mg $210.00 | 10mg $79.99; 15mg $109.99; 20mg $129.99; 30mg $149.99 | $70.00/10mg | $50.00/10mg | $63.00 | $45.00 | UNYX Peptides |
| Semax | 10mg $65.00 | 5mg $40.00; 10mg $60.00 | $65.00/10mg | $60.00/10mg | $58.50 | $54.00 | UNYX Peptides |
| Sermorelin | 5mg $60.00 | 5mg $55.00; 10mg $100.00 | $120.00/10mg | $100.00/10mg | $108.00 | $90.00 | UNYX Peptides |
| SS-31 (Elamipretide) | 10mg $70.00; 30mg $160.00; 50mg $215.00 | 10mg $119.99 | $43.00/10mg | $119.99/10mg | $38.70 | $107.99 | American Peptides |
| TB-500 | 10mg $100.00 | 5mg $59.99; 10mg $109.99 | $100.00/10mg | $109.99/10mg | $90.00 | $98.99 | American Peptides |
| Tesamorelin | 10mg $120.00; 20mg $190.00 | 5mg $80.00; 10mg $135.00 | $95.00/10mg | $135.00/10mg | $85.50 | $121.50 | American Peptides |
| GLP-2T | 10mg $100.00; 20mg $170.00; 30mg $240.00; 60mg $390.00 | 5mg $49.99; 10mg $79.99; 15mg $109.99; 20mg $129.99; 30mg $149.99 | $65.00/10mg | $50.00/10mg | $58.50 | $45.00 | UNYX Peptides |
| Wolverine | 20mg $195.00 | 10mg $79.99; 20mg $139.99 | $97.50/10mg | $70.00/10mg | $87.75 | $63.00 | UNYX Peptides |
The line count is UNYX Peptides 11, American Peptides 9, and the same split holds after codes. GLP-3R is the only tie in this table. The gaps are uneven: UNYX Peptides is 3% lower on BPC-157 before the code and 35% lower on Glutathione, while American Peptides is 33% lower on KPV and 64% lower on SS-31. The basket runs the other way. One standard amount of every comparable compound costs $1,288.90 at American Peptides and $1,413.63 at UNYX Peptides before codes, or $1,160.01 and $1,272.26 after them. American Peptides wins fewer lines, but its wins sit on expensive compounds such as SS-31 and Tesamorelin.
The melanocortin lines, Kisspeptin-10 and Oxytocin
The melanocortin group goes to American Peptides on all three shared lines. Melanotan-1 (MT-1) costs $55.00 for 10mg there against $79.99 at UNYX Peptides, 31% less before the code and $49.50 against $71.99 after it. Melanotan-2 (MT-2) is $55.00 against $69.99, 21% less, and PT-141 (Bremelanotide) is $60.00 against $74.99, 20% less. One caveat on the paperwork: the October 4 comparison lists Melanotan-2 10mg among the four available American Peptides rows with no exact certificate control.
Kisspeptin-10 is not a shared line in this comparison. American Peptides has 10mg in stock at $60.00. UNYX Peptides lists Kisspeptin-10 10mg at $149.99, but it was out of stock at the October 21, 2026 check, so it is counted among the 16 compounds only American Peptides stocks. Oxytocin is not a line at all: neither vendor had it listed in the stock data we checked.
Which is cheaper for GLP-3R, GLP-2T and GLP-1S?
GLP-3R ties at the standard amount: $66.67/10mg before the code at both vendors and $60.00 after it. The packages differ. American Peptides sells 10mg at $105.00, 20mg at $200.00, 30mg at $240.00 and 60mg at $400.00. UNYX Peptides sells 5mg at $75.00, 10mg at $100.00, 15mg at $109.99, 20mg at $150.00 and 30mg at $200.00.
The paperwork does not tie. American Peptides' GLP-3R 30mg certificate reports 30.84mg and 99.9% purity. UNYX Peptides has GLP-3R reports at 5mg, 10mg, 20mg and 30mg, no exact report for its 15mg listing, and two August GLP-3R strengths that print the same lot label, UNRT5.
GLP-2T and GLP-1S favor UNYX Peptides. GLP-2T costs $50.00/10mg there against $65.00 at American Peptides before codes, and $45.00 against $58.50 after, 23% less. GLP-1S costs $50.00 against $70.00 before codes, and $45.00 against $63.00 after, 29% less. UNYX Peptides leaves GLP-2T 30mg and GLP-1S 15mg without an exact report. American Peptides' GLP-1S 5mg row was out of stock at the check.
Whose lab paperwork goes further?
American Peptides. Its archive holds 114 certificates, all from Bioviridian, and all 114 matched the issuing laboratory's own record for the printed Web Verification Code. Every certificate prints American Peptides as the vendor, plus identity, measured content and overall purity. The 26 recovered June 17, 2026 reports, COA4841 through COA4866, also print USP71 sterility, aggregate USP232 heavy metals below 0.01 ppm and USP85 endotoxin below 0.05 EU/mL.
Coverage is not complete. The October 4 comparison has exact controls on 52 of 56 available product-and-strength rows, leaving four without one. One file, COA3364, prints a Web Verification Code that duplicates the COA3362 file, and the P21 5mg report is a clear-liquid sample retained without a powder control.
UNYX Peptides holds 44 certificates, all from Freedom Diagnostics. All 44 matched the laboratory's own file index, all name UNYX Peptides as the client, and each runs LC-MS identity, HPLC-UV purity and measured net content. Printed purity spans 99.30% to 99.97%, measured content spans 93% to 147% of label, and report dates run from April 23 to August 4, 2026. Thirty-two of 41 active product-and-strength rows carry the newest exact certificate. Nine in-stock strengths show none, among them BPC-157 5mg, Ipamorelin 5mg, GLP-1S 15mg, GLP-2T 30mg, GLP-3R 15mg, Semax 5mg, Sermorelin 5mg and Tesamorelin 5mg.
Scope is the difference. No UNYX Peptides report adds endotoxin, heavy-metal, sterility or fentanyl testing, so those risks stay untested across the whole archive. American Peptides' June and August batches add endotoxin and heavy-metals results, and its archive holds 114 records against 44. The COA library keeps the retained reports for both vendors.
Is the 10% reader code worth it?
Both codes are verified and both take 10% off. American Peptides uses JOHN105699, confirmed by PeptidePrices and checked on October 3, 2026. UNYX Peptides uses peptideprices, confirmed at checkout on September 8, 2026 and checked on October 3, 2026; it is not auto-applied. Terms sit on the American Peptides coupon page and the UNYX Peptides coupon page.
The code is worth using at either checkout, but it changes no ranking. At the basket level it moves American Peptides from $1,288.90 to $1,160.01 and UNYX Peptides from $1,413.63 to $1,272.26. The lower vendor stays the same on every row of the table.
Who ships to my address, and what does it cost?
United States only. American Peptides ships inside the United States only, and UNYX Peptides lists the United States.
American Peptides advertises free shipping over $300 and FedEx 2-day express at $13, confirmed at checkout on September 20, 2026. Orders process in 24 to 48 business hours and ship the same day before 2PM EST. Checkout takes credit or debit cards and Apple Pay. All sales are final, and damaged or incorrect items must be reported within 72 hours of delivery.
UNYX Peptides publishes 1 to 2 business days of preparation and same-business-day dispatch before noon Mountain or 2pm Eastern. UPS 2-3 day delivery costs $20, free shipping starts over $200, and overnight is $60. Checkout takes credit or debit cards only. No returns are accepted, and a lost, wrong or damaged order must be reported within seven days of delivery.
Who should pick American Peptides?
Researchers who treat the certificate archive as the main purchase. That means a named issuer match on every report, endotoxin and heavy-metals results on recent batches, and an exact control on 52 of 56 available rows. It also suits Apple Pay users, US addresses, and buyers of the compounds where it is lower per standard amount: MOTS-c, Tesamorelin, SS-31, KPV, TB-500, DSIP, PT-141 and both Melanotan lines. The trade-offs are a mixed review record, final sales and one duplicated verification code. Trustpilot shows 4.3/5 from 53 reviews on an unclaimed profile, with September fulfillment and support complaints alongside recent delivery praise.
Who should pick UNYX Peptides?
Buyers whose list runs through the compounds where UNYX Peptides is lower: BPC-157, GHK-Cu, Glutathione, Selank, Semax, Sermorelin, GLOW, KLOW, the Wolverine, GLP-1S and GLP-2T. It also fits buyers who want one named laboratory on every report, a $200 free-shipping threshold, a $60 overnight option, or a published Tempe street address. The limits are documented. Nine in-stock strengths have no certificate, no report adds endotoxin, heavy-metal or sterility testing, and the Arizona GMP and FDA-registered facility statements are vendor claims without a published plant name or certifier. Checkout takes cards only and accepts no returns. The independent review record is thin, with no Trustpilot profile, a few positive Reddit reports and zero PeptidePrices community reviews.
How this comparison is funded
PeptidePrices has affiliate relationships with some vendors. Affiliate status carries no weight in scores. The rubric is 40% COA practices and 20% each for reputation, transparency and operations, published on the trust and methodology page.
Questions buyers ask about American Peptides vs UNYX Peptides
Is American Peptides or UNYX Peptides cheaper?
UNYX Peptides is cheaper on 11 of the 21 shared compounds and American Peptides on 9. The full basket runs $1,288.90 against $1,413.63 before codes, and $1,160.01 against $1,272.26 after.
Which vendor has more certificates of analysis?
American Peptides, with 114 records against 44. All 114 matched Bioviridian records and all 44 matched Freedom Diagnostics records. American Peptides covers 52 of 56 available rows; UNYX Peptides covers 32 of 41 active rows.
Which laboratory issues each vendor's certificates?
Bioviridian issues the American Peptides certificates. Freedom Diagnostics issues the UNYX Peptides certificates.
Do American Peptides and UNYX Peptides have coupon codes?
Yes. JOHN105699 takes 10% off at American Peptides and peptideprices takes 10% off at UNYX Peptides. Both are verified.
Does either vendor ship outside the United States?
No. American Peptides ships inside the United States only, and UNYX Peptides lists the United States.
Is UNYX Peptides the same company as Onyx Research?
No. UNYX Peptides is a different company from Onyx Research.
Which vendor has more independent reviews?
American Peptides has a Trustpilot score of 4.3/5 from 53 reviews, checked on October 3, 2026. UNYX Peptides has no established review aggregate on file and zero PeptidePrices community reviews.