Best TB-500 Vendors
87 vendors we track carry TB-500. The 57 that pass our testing gate are ranked below by PSR score, with the certificate each one posts for TB-500, a price matched at 10mg and any reader code. For laboratory research use only.
- Carry it
- 87
Carry it
- Pass testing gate
- 57
Pass testing gate
- Lab-confirmed COAs
- 58
Lab-confirmed COAs
Want every carrier ordered by its TB-500 certificate instead, with sizes and stock? See the full TB-500 comparison. How a score is built: How we rate. How to check a certificate yourself: how to read a peptide COA.
Top 3 TB-500 vendors by PSR score
The highest PSR scores among open stores that carry TB-500 and pass our testing gate. Affiliate status plays no part in this list.
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
#1 by PSR score
Zeptix Labs8.17Strong- Certificate
- Verified (opens in new tab)
- Lab
- Accumark LabsTier B+
- Purity
- 99.1%
- Tested
- Price
- $9.50/mg ($95.00 for 10mg)
#2 by PSR score
Southern Aminos8.09Strong- Certificate
- Verified (opens in new tab)
- Lab
- ILS LaboratoriesTier B+
- Purity
- 99.84%
- Tested
- Price
- $4.80/mg ($48.00 for 10mg)
#3 by PSR score
Amino Club8.08Strong- Certificate
- Verified (opens in new tab)
- Lab
- ILS LaboratoriesTier B+
- Purity
- 99.51%
- Tested
- Price
- $4.00/mg ($39.99 for 10mg)
Best TB-500 vendors with a reader discount
Affiliate partners that pass the testing gate and give readers a code that applies to TB-500, in PSR score order. This block is a convenience only: the ranking below is the same with or without it.
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
- Zeptix Labs8.17Strong
- Ameano Peptides7.80Strong
- Honest Peptide7.71Strong
- Ascension Peptides7.55Strong
- BioLongevity Labs7.24Strong
- Arctic Lab Supply7.09Strong
- Limitless Biotech6.97Fair
- Pinnacle Peptide Labs6.60Fair
- JD BioWorks6.34Fair
- Hello Stacks6.08Fair
- NextGen Peps5.95Fair
- AminoVault5.78Fair
Every TB-500 vendor that passes the gate, by PSR score
57 vendors, highest PSR score first; equal scores are listed alphabetically. Price per mg is matched at 10mg, the size most carriers sell, so vials compare like for like. The certificate column is the vendor’s certificate for TB-500 only. Affiliate status never affects the order (how we keep it separate).
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
Listed separately: 30 vendors outside the ranking
These carry TB-500 but do not meet our testing gate, so they are never placed in the ranking above, whatever their score. The gate records what we could verify; it is not a finding of a quality or safety problem.
Show 30 vendors that fail the testing gate
Best TB-500 vendors: frequently asked questions
Who is the best TB-500 vendor?
By PSR score, Zeptix Labs is the highest-rated open store carrying TB-500 that passes our testing gate (8.17/10, Strong). Southern Aminos (8.09) and Amino Club (8.08) follow. The certificate each of them posts for TB-500 is shown beside the score, so a reader can check it before buying.
Where can I buy TB-500 with a discount code?
12 affiliate partners carrying TB-500 pass our testing gate and give readers a code that applies to it. The highest rated is Zeptix Labs (code PSR20, 20% off). We may earn a commission on those links; it never changes a score or a rank.
How are these TB-500 vendors ranked?
By PSR score, the published vendor score out of 10, built from lab testing, certificate verification, pricing, shipping, operating history and reviews under the rules on How We Rate. Equal scores are listed alphabetically. Price per mg and the certificate for TB-500 are shown but do not change the order, and affiliate status never does.
Why are some TB-500 vendors listed separately?
30 vendors carrying TB-500 do not meet our testing gate: third-party testing could not be established or independently verified. They are listed below the ranking rather than in it. The gate records what we could verify; it is not a finding of a quality or safety problem.
How do I check a TB-500 certificate of analysis?
Open the certificate from the vendor's row, confirm it names TB-500 and a batch, then look up the verification key on the testing laboratory's own site. 58 of the 87 TB-500 certificates we track were confirmed at the lab. Our guide on how to read a peptide COA walks through each field. For laboratory research use only.