Peptide Sciences

US-based peptide supplier specializing in high-purity research peptides with third-party testing.

What Customers Mention

shippingfastarriveddaysqualityipamorelinconsistentfine

Reviews

May 19, 2026
gonna miss them
Patrick L.

Ordered from these guys for years and never had a bad box. Vials always filled right, packing was tight, COA tucked in every time. Gutted they closed up and still looking for anywhere that comes close.

May 16, 2026
RIP Peptide Sciences

We used peptide sciences for years, but since they went down we moved to Oath peptides (Oath Research) And couldn't be happier. The support is actually much better, they actually answer the phone. The packaging and overall experience just feels better. All that said, we'll miss them. They set the standard.

May 13, 2026
still searching for a replacement
notes_lance

Two months since they closed and I still haven't found a vendor I trust like I trusted them. Open to recommendations for CJC-1295.

May 5, 2026
never received final order
Gregory U.

Placed one last MK-677 order days before they went dark. It never arrived and support has been unreachable. Just disappointing.

Apr 27, 2026
irreplaceable
Erin A.

Years as my one and only vendor for ipamorelin and BPC-157. Never had a reason to look elsewhere. Heartbroken they've shut down.

Apr 20, 2026
best source I had
Damon R.

Long-time customer here. Their TB-500 and CJC-1295 were always clean and shipped fast. Sad they're done, end of a good run.

Apr 14, 2026
order caught in the shutdown
Jeremy X.

Had a BPC-157 order in when they closed. It never went out and nobody has answered a single message since. Frustrating way to lose a customer.

Apr 9, 2026
lost without them
Kyle H.

Used Peptide Sciences for everything. Now they're gone and I have no idea who to trust for MK-677. Hoping the community has suggestions.

Apr 4, 2026
can't believe it
Patricia V.

Ordered CJC-1295 and ipamorelin from them for years without a hitch. Genuinely the most consistent vendor I had. Going to miss them.

Mar 30, 2026
pending order, no response
Dennis Z.

My order was still processing when they shut down. No shipment, no refund, no reply to any of my emails. Just radio silence.

Mar 26, 2026
where do I go now
elijah_method

These guys closing leaves a big hole. Anyone have a reliable alternative for BPC-157 with shipping this fast? Feeling a bit lost.

Mar 21, 2026
end of an era
Jasmine V.

Been my go-to for TB-500 since I started. Sad to see them shut their doors after all these years. They set the bar for domestic shipping.

Mar 17, 2026
are they done for good?
Jonathan I.

Website's been offline for over a week now. Used them for MK-677 a few times. Just neutral confusion at this point, wish they'd say something.

Mar 14, 2026
last order never came
Miles P.

Placed an order for ipamorelin right before the site went dark. Never shipped, no tracking, and my emails have gone unanswered. Out the money.

Mar 11, 2026
gutted they're gone
Jonathan L.

Five years of ordering BPC-157 and CJC-1295 from these guys and now they've closed. Best source I ever had, never a single bad order.

Mar 8, 2026
site won't load
Karen H.

Tried to reorder TB-500 and the site has been down for days. Anyone know if they're actually gone or just having issues?

Mar 1, 2026
quick and reliable
Connor W.

TB-500 shipped same day I ordered. Powder looked great and the COA matched. Hard to beat the turnaround.

Feb 26, 2026
wish testing was independent
Carl Q.

No issues with my ipamorelin order and shipping was fast. Still, I'd trust them more if the COA came from an outside lab instead of in-house.

Feb 22, 2026
good source
Christina R.

GHRP-2 order arrived in two days, sealed and labeled right. Prices are steep but the product is consistent.

Feb 14, 2026
ok overall
training_jose

Product quality was good and shipping quick. Email support is slow though, took several days to hear back on a simple question.

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Vendor Info

StatusUnclaimed
WebsiteVisit
Reviews55
Products23
Lab Tests0

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Peptide Sciences on total.reviews