● Research use only — not for human or animal consumption 21 CFR §312 · view declaration →
● HPLC ≥ 99% · third-party assayed

Research peptides
priced like reagents,
tested like medicines.

Every lot HPLC-verified above 99% purity, independently assayed by Janoshik, COA published the day it ships. Worldwide DDP — duties and taxes included at checkout.

Browse catalog View sample COA
77
compounds in catalog
12k
lots tested to date
72h
avg. ship to door (DDP)
How we test

Six-step QC pipeline

Full methodology →
STEP 01
Synthesis
GMP-grade SPPS
Boston, MA
STEP 02
HPLC
≥ 99% purity
Internal
STEP 03
Mass spec
Identity match
Internal
STEP 04
Endotoxin
< 0.5 EU/mg
LAL assay
STEP 05
Third-party
Janoshik
Independent
STEP 06
COA
Published
Per lot

Trusted by researchers worldwide

72+
Research compounds
99.2%
Purity verified
3rd
Party tested (COA)
DDP
Worldwide shipping
SSL Encrypted
Stripe Secure Payments
COA With Every Order
Ships Within 24 Hours

Catalog · selected compounds

SKUCompoundClassMWPurityDosesPrice
Featured · AP-031

Retatrutide — the triple-agonist under study.

The next-generation incretin currently moving through clinical trials. Synthesised in Boston, HPLC-verified each batch, mass-spec confirmed, and third-party assayed before any vial leaves the lab.

PURITY
99.5%
MOLECULAR WT
4731 Da
ENDOTOXIN
<0.5 EU/mg
Buy Retatrutide 10mg — $219 All sizes →
Tools

Reconstitution + stack builder

Two calculators that take the guesswork out of planning a protocol. No login, math runs in your browser.

Tool · 01

Reconstitution calculator

Tell us your vial strength, how much bacteriostatic water you plan to add, and your target dose. We'll show you the exact insulin-syringe mark to draw to.

mg
mL
µg
Draw to
25
units on a U-100
25u
050100u
Concentration
5.00 mg/mL
Volume per dose
0.050 mL
Doses per vial
40
Cost / dose
≈ $2.23
>99%
Purity, every lot
HPLC, mass-spec, endotoxin
100%
Third-party assayed
Janoshik · COA published
DDP
Worldwide shipping
Tax + duty included at checkout
1:1
Transparent pricing
No markup tiers, no membership

Common questions

What does "research use only" mean in practice?+
All Altpeptide compounds are sold strictly for in-vitro laboratory research. They are not medicines, are not for human or animal consumption, and have not been approved by FDA or any other regulator for therapeutic use. By purchasing, you agree to use them in a laboratory research context.
How do you verify purity?+
Every batch is run on HPLC for purity and on mass spec for identity confirmation. We then send samples to Janoshik Analytical — an independent third-party lab — for verification. The Certificate of Analysis for each lot is published before the vial ships and is searchable by lot ID.
How does DDP shipping work?+
DDP (Delivered Duty Paid) means the price you see at checkout is the price you pay. We handle all customs paperwork, duties, and import taxes for over 80 countries. Average door-to-door time is 72 hours via FedEx Priority with cold-chain packaging for thermolabile compounds.
Why are you cheaper than other suppliers?+
We synthesise in-house, sell direct, and don't run loyalty tiers or reseller programmes. The same vial, with the same testing, costs the same to every customer on every order — no membership unlock, no first-order markup, no bulk minimums.
How are vials stored and shipped?+
All lyophilised peptides ship in tamper-evident vials with desiccant. Cold-sensitive compounds ship in insulated containers with phase-change packs that maintain < 8 °C for 96 hours. Each shipment includes the lot's printed COA and reconstitution guidance.