See our confidence rating for Penguin Peptides above, pulled live from our review database. They carry a broad catalog and post public lab work. Confidence here comes from the depth of testing we can verify on file, and we recheck it as new batches get verified.
A broad catalog, and what fits your list
Penguin carries a wide range, so there's a good chance they stock what you're researching. On the compounds our readers ask about most, they carry GHK-Cu for skin, NAD+ and Glutathione for the longevity and antioxidant research, and 5-Amino-1MQ on the metabolic side. The card below pulls their current per-mg pricing straight from our database, so what you see is always live today.
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 COA picture
Penguin posts third-party certificates of analysis publicly. Read the certificate, match the batch number to the vial you're actually buying, and don't assume a certificate somewhere covers the lot in your cart. 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 actually stands.
There isn't enough public review data yet to show a community signal for Penguin Peptides, which is common for a vendor that's newer or keeps a low profile. Lean on the verified testing for now, and check for recent reviews before you order.
Shipping
Penguin Peptides doesn't publish a free-shipping threshold we've been able to confirm, so check current rates at checkout.
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. Penguin Peptides' rating above reflects the depth of testing we can verify, weighed the same way we weigh every vendor. 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.