We compare 9 SARMs, peptide and nootropic vendors on catalog range, testing transparency and shipping currency — the same data behind every vendor table on Compound X. For research purposes only.
Ranked by testing transparency and catalog breadth on Compound X — see how we rank them below.
Widest catalog on Compound X · Third-party tested · USD pricing
American Peptides carries the widest range of any vendor we track — more than 30 of the compounds listed on Compound X are available through their site, from foundational peptides like BPC-157, TB-500 and CJC-1295 to more specialized listings such as Kisspeptin-10, ARA-290 and 5-Amino-1MQ. Every product page we checked lists a claimed third-party certificate of analysis.
Pricing is set per compound rather than tiered by pack size, which makes it easy to compare against other vendors at a glance. For researchers who'd rather source most of their list from a single site instead of splitting an order across several vendors, American Peptides is our top overall pick.
Broadest peptide specialist · Branded GLP-1 line · Third-party tested
Amino Vault is the second-broadest vendor we track, with 26 compounds listed, and stands out for carrying niche research peptides that fewer vendors stock — SLU-PP-332, SS-31, Thymalin and ARA-290 among them. They also run their GLP-1 compounds (Semaglutide, Retatrutide) under their own AminoGLP branding.
They carry the widest blend selection of any vendor on our list, including both the KLOW and Wolverine blends. Their coupon code also carries the highest fixed discount of any vendor we track at 15%.
Largest SARMs range · In-house testing · GBP pricing
MuscleChem carries the widest SARMs selection of any vendor we track — RAD-140, Cardarine, Ostarine, LGD-4033, S4, SR-9009 and 5-Amino-1MQ are all listed — alongside a solid peptide and PCT range, for 23 tracked compounds total.
One thing worth flagging: MuscleChem is the only vendor on this list where we could not confirm third-party lab testing — their listings reference in-house testing rather than an independently accredited lab. Worth knowing if third-party verification matters for your research.
Tiered bulk pricing · Third-party tested · SARMs & peptides
SwissChems lists 17 of our tracked compounds across SARMs and peptides, with third-party testing claimed on every listing we checked. Several of their peptide listings — TB-500, GHK-Cu, IGF-1 LR3 and MOTS-C among them — offer tiered bulk pack sizes, which can bring the per-mg price down noticeably for larger orders.
One gap we found: Ostarine wasn't currently listed on their site at the time of our last check, so if that's on your list you'll want to compare against MuscleChem or UK Sarms instead.
UK / international pricing · Third-party tested · Highest auto-discount
UK Sarms lists prices in GBP and covers 15 of our tracked compounds across SARMs, peptides and a couple of nootropic-adjacent listings like Selank and Kisspeptin-10. Every listing we checked references third-party testing.
Their discount is the largest of any vendor we track at 20%, and it's applied automatically through our partner link rather than requiring a manual code at checkout.
US SARMs specialist · Third-party tested · USD pricing
Chemyo covers 13 of the SARMs we track — RAD-140, LGD-4033, Ostarine, Cardarine, Andarine (S4), YK-11, SR9009, ACP-105, SLU-PP-332, 5-Amino-1MQ, RAD-150 and MK-677 among them — all sold as liquid solutions with independent FTIR/HPLC testing published for identity, purity and concentration. They don't currently carry any of the peptide, GLP-1 or nootropic-peptide compounds on our site.
If you're comparing SARMs specifically, Chemyo is a mature, US-based option with over 1,500 verified customer reviews averaging 4.9/5 on their own site — but for anything in our Peptides or PCT categories you'll need a different vendor from this list.
Budget entry pricing · Peptides & nootropics · Third-party tested
Amino Club lists 12 of our tracked compounds, focused entirely on peptides and nootropics (Selank and Semax included) — no SARMs. Most listings are priced with a "From $X" structure, meaning the smallest available size is usually the cheapest entry point of any vendor we track for that compound.
It's a solid pick for researchers who want to try a compound at the lowest possible starting cost before committing to a larger order elsewhere.
Liquid-solution SARMs · Third-party tested · USD pricing
Next Chem is the only vendor we track that consistently offers SARMs as liquid solutions rather than capsules — RAD-140, MK-677, Cardarine and SR-9009 are all available in that form, alongside the KLOW and GLOW blends and their Retatrutide listing.
Their catalog is narrower than most vendors on this list at 9 tracked compounds, but if liquid dosing format specifically is what you're after, they're worth checking against the capsule-only vendors.
Smallest catalog, GLP-1 focus · Third-party tested
Purity Peptides has the narrowest catalog we track at 6 compounds, but it's a focused list — BPC-157, NAD+, Tesamorelin and the KLOW blend, alongside both GLP-1 compounds we track: Retatrutide and Semaglutide.
If you're specifically comparing GLP-1 vendor options, Purity Peptides is one of only three vendors on Compound X that carries both Retatrutide and Semaglutide (alongside American Peptides and Amino Vault), so it's worth a look even with the smaller overall range.
The Compound X Rating above is our own assessment, built from three things we check directly — no vendor pays for placement.
We check whether a vendor publishes an independently accredited COA, or only in-house testing, before rating them.
Compounds tracked and category coverage are pulled from the same live vendor data behind every product page.
This is our editorial assessment, not a customer-review score — and no vendor pays for a higher spot on this page.
Full vendor-comparison breakdowns for a few of our most-viewed compounds.
One of the most extensively studied peptides in the preclinical tissue-repair literature.
Compare Vendors →A nonsteroidal SARM with more oncology-context research than most compounds in its class.
Compare Vendors →A growth hormone secretagogue backed by published randomized controlled human trials.
Compare Vendors →Studied for cognition and focus support, with a well-established Russian nootropic-peptide research history.
Compare Vendors →Eli Lilly's triple GLP-1/GIP/glucagon receptor agonist — closely watched in obesity research.
Compare Vendors →One of the earliest SARMs with actual Phase 2 human clinical trial data behind it.
Compare Vendors →Before ordering from any vendor — on this list or elsewhere — run through these checks.
A legitimate vendor will provide a CoA before or with your order. Check that it lists the compound name, purity percentage and test date.
The lab on the CoA should be a real, accredited third-party facility — not the vendor's own lab. HPLC or mass-spectrometry methods are the standard to look for.
The CoA should reference the same batch or lot number printed on your specific vial. A generic, undated CoA that doesn't tie to your batch is a red flag.
Each product page breaks these same 9 vendors down by price, purity testing and coupon code for that specific compound.