A Texas store with a certificate library, a sign-up wall before you can see anything, and no certificates posted for its GLP line. Here's our plain read, with live details straight from our database.
Every vendor gets the same checks. Each card shows what we found for Petratide Science.
Some products we sampled had a lab report.
We randomly checked lab reports for 16 of their 62 products (26% of the catalog).
A vendor's report page is its own choice of what to show, so we don't stop there. We sample products straight from the store, open each listing's linked report, and check it with the testing lab.
4 out of 5 stars
Public reviews are mostly positive.
We look at what buyers say about this store on public review sites and peptide forums.
45 peptides
A wide range to choose from.
We count the distinct peptides they carry. A wider catalog usually means a more established operation.
Cheaper than most
Compared per mg against every vendor we track.
We average their per-mg prices against the market price for the same peptides.
Free shipping $200+
Same-day shipping.
We read the store's own shipping page for free-shipping terms and dispatch times.
Several ways to pay with buyer protection
You have more than one way to dispute a charge if an order goes wrong.
We note every way to pay, and look for payment methods that offer buyer protection. Cards and PayPal let you dispute a charge. Crypto and bank transfers don't.
Established
Some history behind it.
We look for a business registration and check when the store's domain was first registered.
A rating is how much independent proof we found, not a verdict on whether you should buy.
A check we couldn't run doesn't count against a store. It's left out of the math. And a vendor can't pay for a better score.
How we vet vendors →Too few app members have starred this store to count yet.
We haven't scored how openly this store says who runs it yet.
Hidden fees, forced shipping insurance, and whether the cart price holds.
Live per-mg prices from their store. Tap any peptide to compare Petratide Science with every other vendor we track.
42 more at Petratide Science. Each one opens its price comparison.
See our confidence rating for Petratide Science above, pulled live from our review database. Most of the vials we sampled had a matching certificate, which our rating rewards most. You need an account before you can see the catalog, and the GLP line has no certificates on the site. Know both before you order. We recheck it as new batches get verified.
Petratide Science is registered as a Texas company and ships from the US. The domain was registered in October 2025, which our rating treats as a short track record. The catalog includes names women researching peptides ask about, like GHK-Cu, MOTS-c, DSIP and the ipamorelin and CJC-1295 blend.
You can't browse Petratide Science without an account. Visitors who aren't signed in are sent to a login page, and the catalog and prices sit behind it. Sign-up asks for an email, a password, your name, a phone number and a tick confirming you understand the products are for research use.
That means handing over a phone number before you can see a single price, which some readers will happily do and some won't.
Prices in this market move constantly, so treat any single number as a snapshot. Drop the vials you're comparing into the free PPL tool to see your real per-mg cost side by side before you decide.
The library is the strongest part of this page. Petratide Science keeps a certificate library on its own site with batch certificates from two independent labs, ILS Laboratories and Freedom Diagnostics. When we sampled its in-stock vials, most had a matching certificate, either in the library or at the lab's own verifier under the client name PS.
The gaps matter too. A few of the vials we sampled had no certificate we could find anywhere, and the whole GLP line (the retatrutide, tirzepatide and semaglutide products, sold under code names) has no certificates posted in the library. Some lab records for those products exist at the lab under the PS name, but you won't find them on the store's site. If a GLP product is the reason you're here, ask the store for the certificate for your lot before you order, and read it for a lot number that matches the vial in your hand.
A certificate that names Petratide Science or its PS code is the one that counts for your order. If you're new to this, our guide on finding quality sources walks through what a real COA should show you, and our peptides for women guide covers where the research stands.
The community signal for Petratide Science sits at 4 out of 5 stars, a solid read and the kind you want to see before you spend. Read a few of the recent reviews yourself and see if they match your own read.
Checkout takes cards, bank payment, Apple Pay, Google Pay and Zelle, and the bank and Zelle options come with a small discount. Some of the card options hand you off to a partner payment page, so check the name you're paying and keep your order confirmation to match it to your statement. A card is the payment method with the clearest route to dispute a charge. Checkout also asks you to confirm you're 21 or older.
Shipping at Petratide Science is free once your order clears $200. Same-day shipping is available.
How We Do This. A confidence rating isn't a verdict on whether you should buy, it's a snapshot of how much independent proof we could find. Petratide Science's rating above reflects a certificate library and most sampled vials matching, weighed against a short track record and a GLP line with no certificates posted. A vendor can't pay for a better score. Weigh it for yourself, with the live numbers right in front of you.
It's sold for research, and the big human trials haven't been run yet. You knew that, it's why you're reading this and not the label. Vendor details and prices change often, so check with the vendor before you order.
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Research use only. Peptide Price Lab is an editorial calculator. Nothing here is medical advice, a recommendation, or a prescription. Consult a qualified clinician before anything that meets your body.