Rated 4.8 / 5.0 | ‘’Excellent’’
Frequently Asked Questions
Rated 4.8 / 5.0 | ‘’Excellent’’
What exactly am I ordering?
Research-grade peptides supplied as lyophilized powder in sealed vials, strictly for laboratory and research use. Each product page lists the compound, strength, and format so there's no ambiguity before you order.
How should these be stored?
Store sealed vials away from light, refrigerated or frozen per the temperature on each product page. Once reconstituted, keep cold and use within the window appropriate to the compound. Full handling detail lives on every product listing.
How fast do orders ship?
Orders placed before 2pm ET ship the same day, sent from the US with full tracking. Most reach you within a few business days.
Do you offer bulk or multi-vial pricing?
Yes. Multi-vial and bulk pricing is applied automatically at checkout, and larger or recurring orders can be arranged directly - reach out and we'll sort it.
Can you advise on dosing or administration?
No. All products are supplied strictly for laboratory and research use and are not for human or animal consumption, so we don't provide dosing, preparation, or administration guidance of any kind. For research parameters, consult the published literature for the compound.
What's your return policy?
Because these are research materials, we can't accept returns once an order has shipped. If your order arrives damaged or incorrect, contact us within 30 days and we'll put it right.
Are your peptides third-party tested?
Yes - every batch, without exception. Each is independently assayed for identity and purity, with the certificate of analysis available before you buy.
What purity can I expect?
Every compound is verified to 99%+, with the precise figure for your specific batch recorded on its certificate of analysis. We don't publish a round number and hope - the data is there for you to check.
What is a certificate of analysis,
and how do I find mine?
It's the lab document confirming a batch's identity and purity, and the methods behind both. Match the lot number on your vial to its certificate in our COA library to see exactly what you're working with.
Who does your testing?
Every batch is assayed by an independent, third-party laboratory - not in-house.
What testing methods do you use?
Identity and purity are confirmed by HPLC and mass spectrometry, the standard analytical methods for peptide verification. Each certificate lists the results for that specific batch.
How do I know the COA matches
my actual vial?
Every vial carries a lot number that ties directly to its certificate. Enter or match that number against the COA library and you're verifying your exact batch - not a generic sample.
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Why Choose Peptide First?
Stronger value, professional standards, and verified quality in every order.
Exceptional purity
Every batch independently assayed by HPLC and mass spec to 99%+.
Fast Delivery
Order before 2pm ET for same-day US dispatch to all 50 states.
Transparent quality
A downloadable COA for every batch. Match the lot number on your vial before you begin.
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Rated 4.8 / 5.0 | ‘’Excellent’’
What researchers Say About us
Rated 4.8 / 5.0
The best on the market
"First thing I did was check the COA against the lot number on the vial, and it matched. Independently verified purity, with the certificate right there to confirm it. No guessing, no researching it on faith."
Alex G.
Verified Member
Rated 4.8 / 5.0
Same purity, better price
"I was paying noticeably more elsewhere for documentation that wasn't half as clear. Same verified purity, lower cost per mg, paperwork on every batch. Thanks Guys!."
Dan F.
Verified Member
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