Side by side
From our two full reviews, checked September and October 2026.
| BioLongevity Labs | Limitless Biotech | |
|---|---|---|
| Prices | Shown on every product page | Hidden until you create an account |
| BPC-157 (10mg) | $99.97, or $84.97 with ATLAS15 | Not public |
| Certificates | Public database, before purchase | Per lot on each product page, before purchase |
| Named testing labs | Three: SafeCert Labs, BioRegen, AV Analytics | Not named |
| Separate sterility and endotoxin reports | Endotoxin reports for some batches | Yes, per lot |
| Returns | Opened: no. Unopened: 10 days, 15% restocking fee | 10 days via returns portal, no restocking fee stated |
| Ships | From the US | From the US, ships worldwide |
| Claims we verified | 3 of 3 | 1 of 1 |
Where BioLongevity is stronger
BioLongevity Labs
BPC-157 (10mg)
Price transparency. You can compare BioLongevity against anyone without signing up. Limitless makes you register first.
Named labs. BioLongevity says who tests its batches, and BioRegen and AV Analytics certificates can be looked up on those labs' own sites. Limitless makes strong testing claims without naming the lab, so a reader can't check them independently.
Where Limitless is stronger
Batch-level detail. Limitless lists each lot on the product page with its own purity, sterility and endotoxin documents. You can check the exact batch you'd receive, from three separate reports.
Returns. Ten days through a returns portal, with no restocking fee on its policy page. BioLongevity's policy is much stricter.
International shipping, if you're outside the US.
Which to pick
BioLongevity Labs
TB-500 (10mg)
Want to know the price up front and who did the testing? BioLongevity. Want per-batch sterility and endotoxin reports and a gentler return policy? Limitless.
Both are research-chemical sellers. Neither sells an approved product. Full detail is in our BioLongevity Labs review and Limitless Biotech review. If you go with BioLongevity, code ATLAS15 takes 15% off at biolongevitylabs.com.
