I have not ordered from 99 Purity Peptides yet, so, like my American Peptides profile, this is a first-look built from what's published on their site, not a hands-on order account. I'll update this post once I've placed a real order and checked a batch against its COA myself.
What they sell
99 Purity Peptides covers a wide range: GLP-1 and metabolic compounds (including retatrutide), healing and recovery peptides, nasal sprays, cosmetic and skin products, sexual and hormonal peptides, growth hormone secretagogues, cognitive and nootropic blends (Semax/Selank), and blended products like KLOW and GLOW. Prices on featured products run roughly $70 to $140.
What they publish about testing
They maintain a certificates page listing around 25 batches (semaglutide, retatrutide, DSIP, and others) with batch numbers, analysis dates, and purity percentages, plus downloadable PDFs. The site describes "independent, third-party US laboratories" doing HPLC and LC-MS testing, but does not name a specific lab anywhere I could find, and most rows on that batch table show a dash instead of an actual purity number. Only a couple of entries (semaglutide at 103.6%, NAD+ at 91.9%) show a filled-in figure. That's worth noting on its own: a reported purity over 100% isn't a testing result you'd normally expect to see published without an explanation, and I don't have one.
Their own disclaimer also states purity "may vary by product and lot; certain items may test below 99% purity," which sits oddly next to the "99.1% purity" language used elsewhere on the site. That inconsistency, plus the mostly-blank batch table and unnamed lab, is the main thing I'd want resolved before ordering.
I also pulled two sample lab reports from their library, for retatrutide and MOTS-C, both issued by Eagle Analytical Services, Inc. and signed by their QC manager, with real submission and lot numbers. But both reports test only for sterility (ScanRDI) and bacterial endotoxin (USP<85>), not purity or identity: no HPLC, no mass spec, no purity percentage on either one. That's a narrower kind of testing than what "certificate of analysis" implies for a research peptide, and it lines up with the mostly-blank purity column on their certificates page. If you order from them, ask specifically for a full identity-and-purity COA for the exact product and lot you're buying, not just a sterility and endotoxin report.
Shipping and returns
Stated domestic shipping is 3 to 7 business days, with international at 7 to 15 business days depending on customs, and 1 to 3 business days of processing before anything ships. Shipping cost varies by weight and destination; the site mentions free domestic shipping over an unspecified order threshold. International orders are responsible for duties and customs fees, and the site notes some destinations restrict research-use compounds legally. Full refund terms are on a separate policy page, so read the specifics there before you buy.
Customer service
Listed contacts are orders@99puritypeptides.com, support@99puritypeptides.com, a phone number, and a contact page. As
with American Peptides, I haven't tested response times myself.
Pricing and the discount
99 Purity Peptides runs a referral program. Using my link below applies my code, PEPTIDEPAPA10, at checkout.
(This is my affiliate link. See the affiliate disclosure for how that works.)
What I'd still check before you order
- Ask which lab actually does the purity and identity testing. The two sample reports I reviewed (Eagle Analytical Services) cover sterility and endotoxin only. The site's certificates page never names a lab for purity or identity testing, and most rows there are blank.
- Ask about the blank rows on the certificates page. Most listed batches don't show a purity number at all. Before ordering that product, ask for the actual filled-in COA.
- Reconcile the purity claims yourself. The site advertises "99.1% purity" in places while its own disclaimer says some items may test below 99%. Get the specific number for the specific batch you'd receive.
- "USA Made" and "503A/503B Standards" are stated, not documented. I found no linked certification or regulatory filing backing those claims on the site.
- If you're using the military discount, note it asks for an uploaded ID. The site says the file is encrypted and destroyed, but there's no detailed data-handling policy beyond that statement.
Papa's take
There's more here that gives me pause than with American Peptides: a certificates page that's mostly blank where the purity numbers should be, sample lab reports that confirm sterility and endotoxin but not purity or identity, an unnamed lab for the testing that actually matters most for a research peptide, and marketing copy that contradicts the site's own disclaimer on purity consistency. None of that means the products are bad. It means the published documentation doesn't yet back up the headline purity claims as cleanly as I'd want before recommending it without reservation. I'll order and check a real batch, including a full identity-and-purity COA, before updating this take.