Amino Science Labs vs Rebirth Labs (2026 Comparison)

Amino Science Labs vs Rebirth Labs at a glance

Stock checks for both vendors ran on October 21, 2026. Full reviews: Amino Science Labs review and Rebirth Labs review.

The price split: Rebirth Labs leads 17 of 27, Amino Science Labs leads 15 of 27 after codes

The catalogs share 27 compounds, all normalized at both vendors. The table uses each vendor's cheapest in-stock package per compound, scaled to the compound's standard research amount; the coupon columns apply the 20% and 10% codes.

Across all 27 shared compounds, Rebirth Labs is lower on 17 before codes and Amino Science Labs on 10. After codes the split is Amino Science Labs 15, Rebirth Labs 12. Totals reverse: $1,332.93 against $1,291.22 before codes, then $1,066.35 against $1,162.09 after them.

The reversal is not uniform. Rebirth Labs keeps its lead on SS-31 (59% less), TB-500 (39% less), and BPC-157 (18% less). Amino Science Labs keeps its lead on GLP-1S (39% less), GLP-2T (37% less), and Cagrilintide (35% less). The code changes the answer on GLP-3R, KPV, MOTS-c, Tesamorelin, and the CJC-1295 No DAC plus Ipamorelin listing. KPV lands at $35.99 against $36.00.

Catalog breadth also differs. Rebirth Labs lists 46 in-stock listings across 34 compounds; Amino Science Labs lists 40 across 30. Rebirth Labs carries seven exclusives: AHK-Cu, FOXO4-DRI, Kisspeptin-10, LL-37, Melanotan-1 (MT-1), Pinealon, and Thymosin Alpha-1. Amino Science Labs carries three: AOD-9604, CJC-1295 (With DAC), and Sermorelin.

Certificates: 119 reports at Rebirth Labs, 32 at Amino Science Labs

Both vendors use Freedom Diagnostics for every matched certificate. COA practices carry 40% of the score for both. Read the methodology.

Amino Science Labs: 32 of 32 matched, three core panels

PeptidePrices retained all 32 public reports and matched each to the exact Freedom Diagnostics issuer PDF. All 32 name Amino Science Labs as the client, share a May 18, 2026 report date, and cover 22 compounds. Each runs LC-MS identity, HPLC-UV purity, and measured content. None reports endotoxin, sterility, heavy metals, or fentanyl, though the vendor's quality page says each certificate includes endotoxin testing.

Purity runs from 99.22% to 99.97%, and no report falls below 99%. The BPC-157 10mg report prints 99.24% purity and 9.69mg content. Tesamorelin 10mg prints 10.31mg, and MOTS-c 10mg prints 8.88mg. The Cagrilintide 10mg report prints 4.68mg against its 10mg label, and Glutathione 750mg prints 594.94mg.

29 of the 40 current listings carry an exact issuer-verified certificate. The newest matched analysis is dated May 18, 2026, and current shipped-lot identity remains unconfirmed. Retained files sit in the COA library.

Rebirth Labs: 119 of 119 matched, with safety panels

PeptidePrices retained 123 Freedom Diagnostics documents across four batches dated April 27, May 23, July 16, and September 2, 2026. All 123 name Rebirth Labs as the printed client. 119 resolve to the laboratory's own accession-addressable PDF and match on client, accession, search code, product, lot, report date, identity, purity, and measured content. Those 119 form the public library; the live COA page links 54 of them.

Panel coverage is broader. 75 of the 123 reports carry an endotoxin result: all 47 from September 2, 21 of 47 from July 16, and 7 of 19 from April 27. The September 2 batch also reports microbial PCR and fentanyl on every report.

Four documents stay out of the library because no laboratory PDF could be retrieved: 5-Amino-1MQ 50mg, ARA-290 10mg, ARA-290 50mg, and SLU-PP-332 10mg. Three of the four have no issuer-verified certificate anywhere in the archive, and their retained reports print content far below the label: ARA-290 10mg at 3.59mg and 50.78% purity, ARA-290 50mg at 24.61mg and 57.23% purity, and SLU-PP-332 10mg at 0.27mg. The 5-Amino-1MQ 50mg row, listed at $119.99, is different: issuer-verified certificates exist from July 16 and May 23, 2026, but the current row drew on a September 2 report with no retrievable record, so it carries no certificate control.

45 of 46 in-stock listings carry an exact issuer-verified certificate, and the newest matched analysis is dated September 2, 2026.

Rebirth Labs leads on breadth and depth: 119 reports against 32, 45 of 46 listings covered against 29 of 40, and safety panels Amino Science Labs does not publish. Amino Science Labs' advantage is uniformity: 32 complete one-page matches from one date, with no held-out documents. Neither archive proves the shipped vial matches the tested lot, so check the lot and strength on the certificate.

Codes: both take PEPTIDEPRICES, but Amino Science Labs gives 20% and Rebirth Labs gives 10%

Both codes are verified by PeptidePrices. The code is PEPTIDEPRICES at either checkout. Amino Science Labs applies 20% off, checked October 3, 2026; Rebirth Labs applies 10% off, checked October 6, 2026. Amino Science Labs does not auto-apply the code, so enter it at checkout. PeptidePrices has no auto-apply status on file for Rebirth Labs.

The code reverses the total. Rebirth Labs leads before codes, but Amino Science Labs is at $1,066.35 after its code against $1,162.09 at Rebirth Labs.

Confirm the discount in the cart before paying. Terms and checkout steps: Amino Science Labs coupon code and Rebirth Labs coupon code.

Shipping and payment: US-only at both, with different checkout options

Both vendors list United States shipping.

Amino Science Labs takes credit and debit cards. It states same-day dispatch before 5pm Central when its conditions are met. Cancellations are accepted only before shipment. Returns are not accepted after shipment, and damaged or incorrect items must be reported within 48 hours. PeptidePrices did not record a shipping price or a free-shipping threshold for the store.

Rebirth Labs lists Visa, American Express, Apple Pay, Google Pay, Venmo, Zelle, and Cash App. Its shipping policy, last updated April 7, 2026, states one to three business days of processing and tracked delivery, with USPS service to P.O. boxes and APO, FPO, and DPO addresses. A site banner advertises free shipping from $250. Product pages state a site-wide Buy One, Get One 50% Off promotion: add two items and the second is half price. Sales are final, and damaged or incorrect orders must be reported within 48 hours.

Rebirth Labs publishes more shipping detail and more payment methods. Amino Science Labs publishes the earlier dispatch cutoff, though it applies only when the stated conditions are met. Two Rebirth Labs disclosures need care: its refund policy names a different domain, rebirthresearch.com, and its terms state an 18-year requirement while the site shows a 21-year age gate.

Who should pick Rebirth Labs, and who should pick Amino Science Labs

Pick Rebirth Labs if the certificate file decides it. It has 119 reports, endotoxin results on 75 of 123 retained documents, and exact coverage for 45 of 46 in-stock listings. It also carries 34 compounds against 30 and accepts Venmo, Zelle, and Cash App alongside cards and wallet payments.

Pick Rebirth Labs for SS-31, TB-500, BPC-157, or Selank, where its pre-code lead survives the 20% code.

Pick Amino Science Labs if you pay by card and will use the 20% code. After codes it is lower on 15 of 27 shared rows and on the total, $1,066.35 against $1,162.09. It is lower before and after codes on GLP-1S, GLP-2T, Cagrilintide, and GHK-Cu. AOD-9604, CJC-1295 (With DAC), and Sermorelin are Amino Science Labs exclusives.

Amino Science Labs' review carries a service caveat. Its Trustpilot profile showed 4.1/5 from 27 reviews on October 3, 2026, and the profile said the company had replied to all negative reviews. A July to September 2026 cluster of one-star reports describes orders marked shipped that never arrived. Community reports also describe unscannable QR codes and a 10mg Cagrilintide vial matched to a 5mg certificate.

Rebirth Labs has no independent review aggregate on file. Trustpilot removed the exact-domain profile and states that the business goes against its guidelines. The 27 ratings on the storefront are all 5.00 and are vendor-hosted, so PeptidePrices does not treat them as independent evidence.

Neither vendor covers every strength. Rebirth Labs names four documents without a retrievable laboratory record; Amino Science Labs has 11 vial rows without an exact match. Check the row you are buying.

PeptidePrices has affiliate relationships with some vendors. Affiliate status carries no weight in scores, and neither vendor can edit or approve this comparison.

What buyers still ask about Amino Science Labs and Rebirth Labs

Is Rebirth Labs or Amino Science Labs cheaper?

Before codes, Rebirth Labs is lower on 17 of 27 shared compounds and on the total, $1,291.22 against $1,332.93. After codes, Amino Science Labs is lower on 15 of 27 and on the total, $1,066.35 against $1,162.09.

Which vendor has more verified COAs?

Rebirth Labs holds 119 public reports against 32 at Amino Science Labs. It also has exact coverage for 45 of 46 in-stock listings, against 29 of 40.

Do both vendors use Freedom Diagnostics?

Yes. Every matched certificate in both libraries is a Freedom Diagnostics report. Rebirth Labs adds endotoxin results on 75 of 123 retained documents and microbial PCR and fentanyl on the 47 reports from September 2, 2026. Amino Science Labs' 32 reports cover identity, purity, and measured content only.

Do Amino Science Labs and Rebirth Labs have coupon codes?

Both use PEPTIDEPRICES. Amino Science Labs gives 20% off and Rebirth Labs gives 10% off. Both offers are verified; the codes were checked October 3 and October 6, 2026.

Do the two stores ship outside the United States?

No. Both publish United States shipping only. Rebirth Labs states one to three business days of processing and USPS delivery to P.O. boxes and military addresses. Amino Science Labs states same-day dispatch before 5pm Central when its conditions are met.

Which vendor carries more compounds?

Rebirth Labs lists 46 in-stock listings across 34 compounds; Amino Science Labs lists 40 across 30. Seven compounds appear only at Rebirth Labs and three only at Amino Science Labs.