Best Seller 
Metabolic Research
RetatruStar (GLP-3R)
10mg20mg30mg
from $70
Research-Grade · 99%+ Purity
The new standard in research peptides
Independently tested, USA-fulfilled, and shipped same-day. PEPSTAR delivers verified-purity compounds your research can rely on.
Third-party tested
99%+ purity
Same-day shipping
99%+Verified purity
44Research compounds
Third-Party TestedHPLC & MS verified
99%+ PurityEvery batch, every vial
Fast, Discreet ShippingSame-day before 3PM EST
USA BasedDomestic fulfillment
Best Sellers
View all
Most-ordered compounds
The peptides researchers reach for first — in stock and ready to ship.
Best Seller 
Sterile Water
BAC Water
3ml10ml
from $5
New 
Nootropic Research
PT-141 (Bremelanotide)
10mg
$40
New 
Longevity Research
MT-II (Melanotan II)
10mg
$35
New 
Longevity Research
DSIP (Delta Sleep Inducing Peptide)
15mg
$45
New 
Longevity Research
Epithalon (Epitalon)
50mg
$120
New 
Longevity Research
FOXO4-DRI
10mg
$80
New 
Longevity Research
AHK-cu
100mg
$85
Browse by Research Area
Shop by category
Eight focused research categories, 44 compounds in total.
Why PEPSTAR
Quality you can verify
We hold every batch to a standard your research deserves.
Independently Tested
Every compound is third-party verified by HPLC and mass spectrometry for 99%+ purity. Certificates of analysis are available for every product.
Fast & Discreet
Orders placed before 3PM EST ship the same day from our USA facility, in plain, temperature-considered packaging. Free shipping over $200.
Researcher Support
Lyophilized, sealed, and labeled with lot numbers and storage guidance. Our team is here to help with documentation and reconstitution questions.