Best Semaglutide Vendors
51 vendors we track carry Semaglutide. The 31 that pass our testing gate are ranked below by PSR score, with the certificate each one posts for Semaglutide, a price matched at 10mg and any reader code. For laboratory research use only.
- Carry it
- 51
Carry it
- Pass testing gate
- 31
Pass testing gate
- Lab-confirmed COAs
- 34
Lab-confirmed COAs
Want every carrier ordered by its Semaglutide certificate instead, with sizes and stock? See the full Semaglutide comparison. How a score is built: How we rate. How to check a certificate yourself: how to read a peptide COA.
Top 3 Semaglutide vendors by PSR score
The highest PSR scores among open stores that carry Semaglutide 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
- 99.56%
- Tested
- Price
- $7.00/mg ($70.00 for 10mg)
#2 by PSR score
Amino Club8.08Strong- Certificate
- Verified (opens in new tab)
- Lab
- ILS LaboratoriesTier B+
- Purity
- 99.9%
- Tested
- Price
- $5.00/mg ($49.99 for 10mg)
#3 by PSR score
Prime Peptides7.94Strong- Certificate
- Verified (opens in new tab)
- Lab
- Freedom Diagnostics TestingTier A
- Purity
- 99.7%
- Tested
- Price
- $11.00/mg ($110.00 for 10mg)
Best Semaglutide vendors with a reader discount
Affiliate partners that pass the testing gate and give readers a code that applies to Semaglutide, 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
- LabFirst Peptides7.73Strong
- Honest Peptide7.71Strong
- Arctic Lab Supply7.09Strong
- NextGen Peps5.95Fair
Every Semaglutide vendor that passes the gate, by PSR score
31 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 Semaglutide 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: 20 vendors outside the ranking
These carry Semaglutide 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 20 vendors that fail the testing gate
| # | Vendor | PSR score | Semaglutide certificate |
|---|---|---|---|
| 1 | Modified Aminos | 6.75Fair | View (opens in new tab) |
| 2 | Amino Amigos | 5.62Fair | Verified (opens in new tab) |
| 3 | Peptide Warehouse | 5.01Weak | Verified (opens in new tab) |
| 4 | Redline Bio Labs | 4.80Weak | Vendor report (lab not established) (opens in new tab) |
| 5 | Vyal Labs | 4.59Weak | NoneNo third-party COA was publicly available at audit time |
| 6 | GenX Bio | 4.39Weak | Verified (opens in new tab) |
| 7 | PSPeptides | 3.95Poor | Vendor report (lab not established) (opens in new tab) |
| 8 | Lotus Peptide | 3.74Poor | NoneNo third-party COA was publicly available at audit time |
| 9 | Peptide Labs | 3.72Poor | Login-gatedCOAs are provided but sit behind the vendor's login wall |
| 10 | BioInfinity | 3.70Poor | Vendor report (lab not established) (opens in new tab) |
| 11 | Spartan Peptides | 3.32Poor | NoneNo third-party COA was publicly available at audit time |
| 12 | Drexa Labs | 3.28Poor | NoneNo third-party COA was publicly available at audit time |
| 13 | RapidCore Bio | 3.26Poor | NoneNo third-party COA was publicly available at audit time |
| 14 | Nextday Peptides | 3.21Poor | NoneNo third-party COA was publicly available at audit time |
| 15 | Snowman Research | 3.06Poor | NoneNo third-party COA was publicly available at audit time |
| 16 | Stack Research | 2.49Poor | View COA (differs from lab copy) (opens in new tab) |
| 17 | Peptide Warehouse US | 2.46Poor | NoneNo third-party COA was publicly available at audit time |
| 18 | PepBiotics | 2.23Poor | NoneNo third-party COA was publicly available at audit time |
| 19 | Welon Peptide Solutions | 2.13Poor | NoneNo third-party COA was publicly available at audit time |
| 20 | PepVial | 1.92Poor | NoneNo third-party COA was publicly available at audit time |
Best Semaglutide vendors: frequently asked questions
Who is the best Semaglutide vendor?
By PSR score, Zeptix Labs is the highest-rated open store carrying Semaglutide that passes our testing gate (8.17/10, Strong). Amino Club (8.08) and Prime Peptides (7.94) follow. The certificate each of them posts for Semaglutide is shown beside the score, so a reader can check it before buying.
Where can I buy Semaglutide with a discount code?
6 affiliate partners carrying Semaglutide 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 Semaglutide 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 Semaglutide are shown but do not change the order, and affiliate status never does.
Why are some Semaglutide vendors listed separately?
20 vendors carrying Semaglutide 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 Semaglutide certificate of analysis?
Open the certificate from the vendor's row, confirm it names Semaglutide and a batch, then look up the verification key on the testing laboratory's own site. 34 of the 51 Semaglutide 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.