Relentless Precision. Intelligent Value.
Research-use-only reference standards
Precision in every peptide.
USA-sourced, USA-synthesized research peptides — every lot third-party tested in an ISO/IEC 17025-accredited lab.
- USA-sourced & synthesized in the USA
- ≥99% peptide purity, guaranteed
- USA ISO 17025-accredited lab COA
- Most orders ship within 24 hours.
Stack up to 50% off eligible research reference standards.*
How to save the most on your order:
- 15% Sitewide Sale — auto-applied to every eligible item, no code needed
- Bulk Discount — add more items, save more (5% / 10% / 15% at 3+ / 6+ / 11+ items). Stacks on top of the sale and the coupon below.
- First-Order Coupon — new customers add another 30% off with code WELCOME30 — for a limited time it stacks on top of the sitewide sale and bulk pricing, up to a 50% maximum discount per item.
The sitewide sale and bulk pricing apply automatically — no code needed. New customers add WELCOME30 at checkout for the extra 30%. Stacked savings are capped at 50% off retail per item; see the per-line breakdown in your cart.
*See discount policy for the full rules + worked examples.
The catalog
Research peptides & reference standards
Every peptide we ship carries a lot-specific Certificate of Analysis. Strictly for in-vitro laboratory research.
GHK-Cu
GHK-Cu (copper-complexed tripeptide, MW ~403 Da, CAS 89030-95-5). Copper
KLOW
KLOW Blend: GHK-Cu (C₁₄H₂₄N₆O₄·Cu, 50mg) + BPC-157 (C₆₂H₉₈N₁₆O₂₂, 15aa,
MOTS-c
MOTS-c (C₁₀₁H₁₅₂N₂₈O₂₂S₂, 16aa mitochondrial-derived peptide, MW ~2,175 Da, CAS
Six reasons researchers choose Precisely Peptides
Every line below is something you can check — on a certificate, on a product page, or in the box.
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99%+
Purity, verified
HPLC-tested against spec by a USA-based, ISO/IEC 17025-accredited third-party laboratory.
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USA
USA-based business, USA-synthesized peptides
All Precisely Peptides research peptides are USA-sourced and synthesized in the USA. Precisely Peptides is a USA-based business — we pack and ship from the United States and sell to U.S. customers only.
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4×Precision7×Black Label
Every lot tested — four ways, seven on Black Label
Precision clears identity, purity, net peptide content and a fentanyl screen on every lot. Black Label adds heavy metals, sterility and endotoxin testing. See what Black Label adds
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Every lot
A COA you can actually open
Lot-specific certificates, published — not promised. Open the COA library
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24hr
Most orders ship within 24 hours
Free standard shipping at $100+, free priority at $250+ — and free loss-and-damage protection in transit on every order.
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30day
Satisfaction guaranteed — we make it right
Return any unopened, factory-sealed vial within 30 days for a full refund, no restocking fee. If an order arrives damaged or incorrect, we replace it and cover the return label. Read the Precisely Promise
For research use only. Not for human consumption. All products are sold strictly as reference standards for in-vitro laboratory research and are not drugs, foods, or supplements.
Precisely Peptides
4.8
Excellent Customer Service, Fast Shipping & Great Prices
I've had a great experience with Precisely Peptides. Their customer service is top notch, always quick to respond and willing to answer any questions. Shipping has been incredibly fast, and orders arrive well packaged and on time. On top of that, their pricing is very competitive compared to other companies I've looked at. Great customer support, fast shipment, and fair prices make them an easy company to recommend. Definitely one of the best experiences I've had ordering peptides.
Fast shipping
Fast shipping, reasonable pricing, helpful service. Would absolutely recommend to friends and family.
Great experience overall
Great experience overall. Highly recommended!
