Lyophilized peptides, blends and bundles for laboratory research. Every batch is HPLC-tested and its Certificate of Analysis is published, so you can check the numbers before you order.
For research use only. Not for human or veterinary consumption.
A few places to start. All 35 research compounds are in the shop.
Markdowns on popular compounds and research bundles. Same lots, same batch COAs, lower price.
Sale prices can’t be combined with coupons.
Incretin-receptor and energy-balance signaling models.
Browse compoundsEach Certificate of Analysis reports the panel run on that exact batch, covering purity and identity along with water, counter-ion and contaminant screens.
High-performance liquid chromatography quantifies purity against a ≥98% specification.
Single and total impurities measured and held under 1% and 2% limits.
LC-MS peptide sequence confirmation against the expected molecular formula.
Measured mass verified within ±1.0 Da of the theoretical value.
HPLC retention time checked against the reference range for the compound.
Residual water (≤6%) and TFA counter-ion (≤0.5%) content measured per lot.
Endotoxin below 0.25 EU/mg and bioburden below 100 CFU/g.
Heavy metals screened against a ≤10 ppm limit.
*Each label carries the compound, size and lot details.Each compound we test has a published Certificate of Analysis with a batch number and full test panel.
Open the COA archive and search for the compound you received, or open the COA link on its product page.
Compare the batch number and size on the report with the details on your order and vial.
Purity, identity, mass, endotoxin, bioburden and heavy-metal results are listed on each certificate.
From documented testing to fast, tracked shipping, every step is set up for research labs.
Same-day shipping on orders placed before 2pm PST, excluding weekends and holidays. Shipping included on orders over $200.
Checkout runs over an SSL-encrypted connection with established payment processors.
Each batch is HPLC-tested against a ≥98% specification. Results for your batch are on its COA.
Lot-specific Certificates of Analysis are published online for tested compounds.
Questions about an order or a compound? Call (855) 595-3083 or email our team.
Every compound in ten-vial packs at 40% below single-vial pricing, 50% at five or more.
Our products are sold to researchers and research institutions for laboratory use only. They are not for human or veterinary consumption. By ordering, you confirm that you will use them only for lawful research.
Each COA lists the batch number, test date and results for purity (HPLC), identity (mass spectrometry) and other checks. Match the batch number on the COA to your vial. All published reports are in the COA Library.
Single-vial orders placed before 2pm PT on business days usually ship the same day from California. 10-packs are packed to order and are not same-day. Shipping is included on orders of $200 or more.
Yes. Every compound is available as a 10-pack at 40% below single-vial pricing, and 50% below once your cart has five or more 10-packs, in any mix of compounds. See Buy Bulk.
Charges appear under the Purpose Peptides business name. If you do not recognize a charge, contact us before disputing it and we will look it up.
Peptides, blends and bundles, shipped from California. Shipping included on orders over $200.
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