Rated Excellent
Best Reviewed Peptides Site on the Internet
Real, third-party verified feedback you can check anytime
Rated Excellent
Best Reviewed Peptides Site
on the Internet
Real, third-party verified feedback you can check anytime
Third-Party Verified
Certified Peptides & BioRegulators
Certified-Pep is the gold standard in peptide research supply verified by third-party COAs and comprehensive contaminant screening.
Third-Party Verified
Certified Peptides & BioRegulators
Certified-Pep is the gold standard in peptide research supply verified by third-party COAs and comprehensive contaminant screening.
Real People • Fast Help
Customer Service Dedication
From order to delivery, we’re here with practical help — plus tracking when you need it.
Real People • Fast Help
Customer Service Dedication
From order to delivery, we’re here with practical help — plus tracking when you need it.
Third-Party Verified
Why Lab Testing Matters
Purity isn’t a slogan — it’s a report. Every batch has results you can read and download.
Third-Party Verified
Why Lab Testing Matters
Purity isn’t a slogan — it’s a report. Every batch has results you can read and download.
Fast support • 7 days a week • 6am–2am
Certified-Pep
As the number 1 rated research peptide company online, Certified Peptides is at the forefront of biomedical and scientific innovation - our research platform is a multifaceted integration of molecular biology, pharmacology, and chemistry, all of which culminates in the production of the purest peptides to the most exacting standards. All of our products are subjected to stringent third-party testing for purity and scrupulously examined for contaminants. And last, but certainly not the least, we have a personable, traditional approach to customer service which is nearly extinct in business today… our service model is the industry gold standard.
Peptides
Short chains of amino acids that act as tiny instructions for cells. In research, peptides are used to probe pathways, mimic protein regions, or serve as building blocks for assays and method development.
Peptide Capsules
Encapsulated short chains of amino acids designed for controlled delivery. In research, peptide capsules help stabilize peptides, enhance absorption, and enable precise dosing for studies, assays, or therapeutic development.
Bioregulators
Ultra-short peptides (often 2–4 amino acids) studied for tissue-specific signaling effects. Researchers use them to explore gene-expression tuning and cellular repair pathways at the organ or system level.
Topical peptides
Topical peptides for anti aging. Skins tightening and wrinkle reset. Unlock your skins true potential through the use of these proven topical peptides.
Bundle and Save
At certified-pep we recognize the need to stay competitive in today's ever changing market. Bundle deal available.
Lab Testing
Every batch third-party verified — confirm identity, method, and purity with COAs.
Customer Support
Real humans, fast help — orders, tracking, and product questions 7 days a week.
Shipping & Tracking
We ship every order same day or next day with usps priority mail. Typical delivery time is 3 to 5 days
Featured products
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SEMAGLUTIDE 50MG BUNDLE 5X10MG
$680.00Original price was: $680.00.$440.00Current price is: $440.00. -
SEMAGLUTIDE 30MG BUNDLE 3X10MG
$408.00Original price was: $408.00.$272.00Current price is: $272.00. -
TIRZEPATIDE 600MG BUNDLE 10X60MG
$3,000.00Original price was: $3,000.00.$2,100.00Current price is: $2,100.00. -
TIRZEPATIDE 300MG BUNDLE 5X60MG
$1,500.00Original price was: $1,500.00.$1,200.00Current price is: $1,200.00. -
TIRZEPATIDE 300MG BUNDLE 10X30MG
$2,300.00Original price was: $2,300.00.$1,250.00Current price is: $1,250.00. -
TIRZEPATIDE 180MG BUNDLE 3X60MG
$1,050.00Original price was: $1,050.00.$750.00Current price is: $750.00. -
TIRZEPATIDE 150MG BUNDLE 5X30MG
$1,150.00Original price was: $1,150.00.$700.00Current price is: $700.00. -
TIRZEPATIDE 90MG BUNDLE 3X30MG
$600.00Original price was: $600.00.$390.00Current price is: $390.00. -
RETATRUTIDE 150MG BUNDLE 5X30MG
$1,280.00Original price was: $1,280.00.$800.00Current price is: $800.00.