Zeptix Labs publishes its company, city, labs and lot-matched COAs, though it has no independent test record yet. As of October 19, 2026, it names its LLC, its city and three testing labs, and its COAs show lot numbers. Most of its listed prices were below the median in our price index, before its buy-1-get-1 offer. We found no Finnrick tests for it.
Notice: Zeptix Labs' products are sold for in-vitro laboratory research only. They are not FDA-approved and not for human or animal use. This review covers supplier transparency and prices. We didn't buy or test any products. Some vendors pay us a commission when you buy through our links. That never changes a score or a price ranking.
Zeptix Labs at a glance
- Website: zeptixlabs.com, live when checked.
- Based in: St. Petersburg, FL.
- Company: Zeptix Labs LLC. No founding year or owner published.
- Testing labs/COAs: Freedom Diagnostics, Accumark and Ichor named; lot-matched COA page.
- Independent tests (Finnrick): we found no Finnrick tests for Zeptix Labs.
- Payment: Zelle.
- Gate: none found.
- Catalog: 15 peptide products listed.
- Checked: October 19, 2026.
Prices we checked
| Peptide | Size | Price | Per mg | vs index median |
|---|---|---|---|---|
| Retatrutide (listed as GLP-3 R; buy-1-get-1) | 10mg | $44.99 | $4.50 | 40% below |
| Retatrutide (listed as GLP-3 R; buy-1-get-1) | 20mg | $69.99 | $3.50 | 53% below |
| Tirzepatide (listed as GLP-2 T; buy-1-get-1) | 10mg | $39.99 | $4.00 | 33% below |
| Tirzepatide (listed as GLP-2 T; buy-1-get-1) | 30mg | $110.00 | $3.67 | 38% below |
| BPC-157 (buy-1-get-1) | 10mg | $29.99 | $3.00 | 50% below |
| GHK-Cu (buy-1-get-1) | 50mg | $19.99 | $0.40 | 43% below |
| GHK-Cu (buy-1-get-1) | 100mg | $29.99 | $0.30 | 57% below |
| MOTS-c (buy-1-get-1) | 10mg | $29.99 | $3.00 | 35% below |
| Tesamorelin (buy-1-get-1) | 10mg | $49.99 | $5.00 | 37% below |
| GLOW (buy-1-get-1) | 70mg | $120.00 | $1.71 | 6% above |
| KLOW (buy-1-get-1) | 80mg | $64.99 | $0.81 | 50% below |
Prices as listed on October 19, 2026. These are the listed per-vial prices; the site was running a buy-1-get-1 offer, which we did not factor into the per-mg figures. Ten of the eleven listings were 33% to 57% below the median across the vendors in our price index, and only GLOW came in above it. Compare retatrutide prices, tirzepatide prices and BPC-157 prices in our price index.
The site advertises 2-day U.S. shipping and free shipping on orders over $200. It also publishes a shipping policy, a refund policy, terms of service and a research-use disclaimer.
Testing and COAs
This is where Zeptix Labs stands out. Its certificates page shows COAs with lot or batch numbers, and the site names three labs: Freedom Diagnostics, Accumark and Ichor. Lot matching matters because it lets you tie a certificate to the batch you receive, not just to the product in general. The site also has an article on how to read a peptide COA.
The site advertises "99%+ verified purity." That is the vendor's own claim, based on its own commissioned testing.
What's missing: any mention of endotoxin or sterility testing, and independent data. We found no Finnrick tests for Zeptix Labs, so there are no customer-submitted samples to check the vendor's certificates against. We named the labs as they appear on the site; we didn't verify the reports with the labs.
What we like
- Company name and city published: Zeptix Labs LLC, St. Petersburg, FL.
- Three testing labs named on the site.
- COAs matched to lot or batch numbers.
- Listed prices below our index median on ten of eleven listings, with a buy-1-get-1 offer running.
- 2-day U.S. shipping advertised, free over $200.
What to watch
- No Finnrick tests found, so there's no independent check yet.
- GLOW 70mg was priced 6% above our index median.
- Only Zelle is mentioned as a payment method.
- No mention of endotoxin or sterility testing.
- A small catalog of 15 products.
How it compares
Zeptix Labs names its company, city and labs, matches COAs to lots and prices most compounds below our index median. What it lacks is independent test history, which some other vendors have on Finnrick. See all vendors we track, peptide deals this week and our ranked list.
Bottom line
On disclosure, Zeptix Labs does well: a named LLC and city, three named labs and lot-matched COAs. Its listed prices were mostly below our index median on October 19, 2026. The gap is independent testing, and we'll update this review when Finnrick lists tests for it.
Last checked October 19, 2026.
