If you are reading this, your vendor is probably gone and your money may have gone with it. Peptide Sciences shut down on March 6, 2026, with no refund process, and a lot of loyal customers were left holding nothing. The instinct after that is to grab the first replacement that looks legit. Slow down for two minutes. The first replacement that looks legit is exactly how people get burned twice.
Here is a short checklist you can run on any vendor before you commit. It works for any seller, not just us. Go down the list, and only buy from someone who passes all of it.
The next-vendor checklist
1. Can you see the Certificate of Analysis before you buy?
The COA is the lab report on what is in the vial. It should be visible up front, per batch, not "available on request." If you have to ask for proof, that is the answer.
2. Is purity documented per lot, not just claimed?
Anyone can type "ninety nine percent pure." You want a specific HPLC reading on a specific lot, with mass spectrometry confirmation. A number without a lab report behind it is marketing.
3. Can you avoid prepaying into a void?
This is the one that just burned everyone. Sending money to a website that can vanish is the core risk. A vendor that lets you complete the deal in person removes it entirely, because you pay when you collect.
4. Is there a real address and a real person?
A physical location with posted hours and an actual human you can reach is far harder to vanish than an anonymous checkout page. If the only point of contact is a support email, ask yourself what you would do if it stopped getting answered.
5. Does the track record go back?
A site that appeared last month to catch the post-shutdown traffic is a gamble. Look for history and reviews on platforms you can check, going back a year or more.
6. Is the catalog deep and documented?
A serious operation carries a broad catalog across the major research classes, with paperwork on every item. Thin catalogs with thin documentation are a warning sign.
7. What happens if something goes wrong?
Ask before you buy, not after. A vendor you can stand in front of can fix a problem in a way a disappeared website never can.
How Peptide Hackers scores
Since the checklist only matters if a vendor actually passes it, here is how Peptide Hackers lines up against all seven.
Every product carries a per batch Certificate of Analysis with HPLC verified purity of ninety nine percent or higher and mass spectrometry confirmation, visible before you buy. Purity is documented per lot with real figures, like Retatrutide at 99.579% and Tirzepatide at 99.505%. The catalog runs more than fifty six research compounds across the major classes at peptidehackers.com.
On the trust points, Peptide Hackers runs two physical storefronts, one in Los Angeles at 2029 Century Park East and one in Newport Beach at 4695 MacArthur Court, with same day in person pickup Monday through Friday from 6am to 6pm. Andrew and Bryant handle pickup in Newport Beach. You can see the product, get the paperwork in hand, and pay at the counter, so there is no prepaying into a void.
Run the list on anyone you are considering. The right vendor will pass it without flinching. If you want to see what passing looks like, browse the catalog and view a live Certificate of Analysis at peptidehackers.com, or schedule a same day pickup in Los Angeles or Newport Beach.
All products are for laboratory research only. Not for human or veterinary use.
Research Use Only
This article is provided for educational purposes. All peptides discussed are sold for research use only and are not intended for human consumption or therapeutic use.