Specialty peptides most US vendors skip — PT-141, Semax, DSIP, Kisspeptin, VIP. We checked the COAs, pricing, and 15% code against every ranked vendor.
Key Takeaways
Specialty-catalog standout — PT-141, Semax, DSIP, Kisspeptin, Thymulin, VIP, Melanotan I, 5-Amino-1MQ all in one place
15% off with code — the second-largest ongoing discount of any vendor we rank
9.5 reputation score in our database, ranked priority 6 among recommended vendors
Third-party COA on every batch — the minimum standard for any vendor we recommend
Not the price leader on GLP-1s or common healing peptides — Ascension, EZ, and Glacier win there
Best fit: when the specialty compound you want isn't stocked by the cheaper vendors
BioLongevity Labs fills a specific gap in the current vendor landscape. Most of the price-leading vendors focus on the same 20 compounds — BPC-157, TB-500, semaglutide, tirzepatide, retatrutide, CJC-1295, the core lineup. BioLongevity goes wider, stocking the specialty and nootropic peptides that most US vendors either skip entirely or rotate in and out of stock.
This review covers what BioLongevity does well, where they're not competitive, and how they stack up against the six other recommended vendors in our database — based on pricing data, COA documentation, and vendor scoring as of April 2026.
Who Is BioLongevity Labs?
BioLongevity Labs is a US-based research peptide supplier with a premium positioning around longevity and specialty compounds. Their catalog leans into peptides that sit outside the mainstream GLP-1 and healing-peptide categories — melanocortin system (PT-141, Melanotan I), nootropics (Semax), sleep (DSIP), reproductive hormones (Kisspeptin), immune (Thymulin), vasoactive intestinal peptide (VIP), metabolic (5-Amino-1MQ), alongside core compounds like Ipamorelin and Follistatin.
They provide third-party Certificate of Analysis documentation on every batch — the minimum bar for any vendor we include in our recommended list. Our database assigns them a reputation score of 9.5 (tied with Ascension Peptides) and a priority rank of 6 among the seven recommended vendors.
The affiliate partnership was approved in March 2026, and their 15% discount with code is the second-largest ongoing discount of any vendor we rank — behind only Ascension Peptides' 50% off through our direct link.
How We Score Vendors
Every ranking on this site comes from the same formula, defined in our vendor scoring system:
Price (40%) — per-mg cost across the catalog, normalized against the lowest-priced vendor in our database
COA (30%) — presence and quality of third-party Certificate of Analysis documentation
The minimum score for any recommended vendor is 8.0 out of 10 — meaning if we list them, they're legit. BioLongevity's 9.5 reputation score reflects established operations, consistent COA documentation, and no major quality incidents on record.
Where they lose points against the top three ranked vendors is pure price. On compounds where they compete head-to-head with Ascension, EZ, or Glacier, their base prices are usually higher. The specialty-catalog premium is real — you pay a bit more per mg for compounds that aren't easy to find elsewhere.
Product Catalog
BioLongevity's catalog strength is specialty and nootropic peptides. Their in-stock compounds include:
Melanocortin system: PT-141, Melanotan I
Nootropics: Semax, Selank (varies)
Sleep: DSIP
Reproductive hormones: Kisspeptin
Immune: Thymulin
Neuropeptides: Oxytocin, VIP (vasoactive intestinal peptide)
Metabolic: 5-Amino-1MQ
Growth hormone / performance: Ipamorelin, Follistatin
Plus more standard compounds across healing and longevity categories
What stands out: PT-141, DSIP, Kisspeptin, Thymulin, and VIP are not always in stock at the price-leading vendors. Ascension focuses on GLP-1s and blends. EZ Peptides carries a broad general catalog but doesn't always stock Kisspeptin or Thymulin. Glacier Aminos is built around retatrutide and healing peptides. BioLongevity's niche is "the specialty compound is always in stock."
Where they're not competitive: GLP-1s (semaglutide, tirzepatide, retatrutide) and core healing peptides (BPC-157, TB-500) — that's Ascension/EZ/Glacier territory. If your research centers on those compounds, the price difference will usually favor the other vendors even after applying BioLongevity's 15% code.
Discount: 15% off sitewide
Code:Applies to: All products including specialty, nootropic, and standard compounds
Duration: Ongoing, no expiration
Stacks with: Nothing — one discount code per order
Enter the code at checkout. The 15% applies to your entire cart with no minimum order and no product restrictions.
How the discount stacks up: Ascension Peptides offers 50% off through our direct link (no code needed) — the largest discount in the space. BioLongevity's 15% is second-largest among ongoing codes, matching Ion Peptide. EZ Peptides, Glacier Aminos, Royal, and Dynamic Peptide all offer 10%. Where BioLongevity's 15% actually matters is on their specialty catalog — because Ascension, EZ, and Glacier often don't stock those compounds at all, the 15% applies to compounds where there isn't a cheaper alternative.
COA & Quality Testing
Every BioLongevity batch ships with third-party Certificate of Analysis documentation covering identity and purity verification. This is the minimum standard we require for any vendor on our recommended list.
How it compares:
EZ Peptides uses QR codes on every product linking to per-product COAs — the most convenient verification system we've seen
Glacier Aminos provides four-panel testing including heavy metals and LPS endotoxin — the most thorough safety panel
Ion Peptide provides lot-specific COAs with full HPLC chromatograms and mass spectrometry profiles
Ascension Peptides provides independent third-party COAs with HPLC and mass spectrometry data
BioLongevity Labs provides per-batch third-party COAs — solid baseline documentation, not the most extensive program in the space
BioLongevity's testing meets the bar. It's not the industry-leading program Glacier or EZ run, but it's sufficient for research work on compounds that many vendors don't test at all.
Pricing Reality
The honest read on BioLongevity pricing: they're competitive on specialty compounds where the cheaper vendors don't stock alternatives, and they're not competitive on mainstream compounds where they do.
Where BioLongevity wins:
PT-141 — available year-round at consistent pricing while other vendors go in and out of stock. See PT-141 vendor comparison.
Semaglutide, tirzepatide, retatrutide — Ascension (50% off), Glacier (cheapest retatrutide), and EZ all beat them on effective per-mg price
BPC-157, TB-500 — Ascension's 50% discount and Glacier's four-panel-tested pricing usually win
Common growth hormone secretagogues (CJC-1295, GHRP-2) — EZ's broader catalog at competitive pricing is typically the better pick
Always compare per-mg price, not per-vial price, when evaluating across vendors with different vial sizes. Our full price comparison tracks this automatically.
Shipping & Customer Service
Shipping: US-based fulfillment with standard domestic shipping and tracking on every order. Transit times and free-shipping thresholds are set by the vendor and can change — confirm current shipping policy directly on their site before ordering.
Packaging: Discreet packaging with proper handling for peptide integrity during transit.
Customer service: Responsive via email and the standard channels for a vendor of this size. No major customer service complaints on record in our vendor database.
Returns: Contact support for damaged or incorrect orders. As with all peptide vendors, confirm current return policy terms directly before purchasing.
What They Do Well
Specialty catalog breadth — PT-141, Semax, DSIP, Kisspeptin, Thymulin, VIP, Melanotan I, 5-Amino-1MQ all under one roof
15% discount — second-largest ongoing code of any vendor we rank, matching Ion Peptide
Per-batch third-party COAs — meets the minimum standard for recommended vendors
9.5 reputation score — tied with Ascension Peptides for the highest reputation rating in our database
Consistent stock on specialty compounds that other vendors rotate in and out
Premium positioning — they're not racing to the bottom on price, which shows up in packaging, documentation, and catalog curation
Honest Downsides
No vendor is perfect. Here's what to know:
Not the price leader on mainstream compounds — GLP-1s, BPC-157, TB-500 all cost more than at Ascension, EZ, or Glacier even after the 15% discount
COA program isn't industry-leading — per-batch third-party COAs are solid baseline documentation, but Glacier's four-panel testing (heavy metals + LPS) and EZ's QR-linked per-product system are more extensive
Newer affiliate relationship — the partnership was approved March 2026, so we have less customer-feedback volume through our channels than for longer-partnered vendors like EZ or Ascension
Smaller catalog than EZ — if you need everything from one vendor, EZ's broader general catalog covers more ground
15% < 50% — on any compound Ascension stocks, their 50% off via direct link will beat BioLongevity's 15% on price
Comparison: BioLongevity Labs vs. Top Alternatives
Feature
BioLongevity
EZ Peptides
Ascension
Glacier Aminos
Reputation score
9.5
9.6
9.5
9.3
Catalog size
20+ (specialty focus)
40+
21
25+
COA type
Per-batch third-party
QR-linked per product
Independent third-party
4-panel (purity, volume, metals, LPS)
Best discount
15% off
10% off
50% off
10% off
PT-141
Yes (consistent stock)
Sometimes
No
No
Semax
Yes
Sometimes
No
No
DSIP
Yes
Sometimes
No
No
Kisspeptin
Yes
Rare
No
No
Thymulin
Yes
Rare
No
No
VIP
Yes
Rare
No
No
5-Amino-1MQ
Yes
Yes
No
Yes
Retatrutide
No
Yes
Yes
Yes (cheapest)
Semaglutide
No
Yes
No
Yes
Standout
Specialty catalog breadth
Broadest general catalog
Largest discount
Cheapest retatrutide + best testing
Bottom line: BioLongevity Labs is the right pick when your research centers on specialty or nootropic peptides — PT-141, Semax, DSIP, Kisspeptin, Thymulin, VIP, Melanotan I, 5-Amino-1MQ. On those compounds, their 15% code applies to a category where the cheaper vendors often don't compete at all. For GLP-1s and common healing peptides, Ascension, EZ, or Glacier will almost always beat them on effective price.
