BH
Bucky Hon
11/27/2025
great products…
Dry great products and excellent customer service
Certified Peptide Reviews
Certified Peptide Reviews: 4 independent lab tests across 1 product, averaging 99.7% purity, and 198 verified customer reviews.
4.9
198 reviews · Excellent
- 4 HPLC samples across 1 products
- Catalog avg purity 99.7%
- certified-pep.com
- Independent testing, no pay-to-rank
Boren Health independently tests products and verifies reviews. Public methodology, no pay-to-rank.
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What the testing shows
Across 3 measured samples from Certified Peptides, 1 came in more than 5% under the quantity on the label (33%). Another 1 measured more than 5% over. Purity across 3 readings ran from 99.4% to 99.9%, median 99.89%. Samples span Aug 2025 to Jul 2026.
- Under label
- 1/3
- Median purity
- 99.89%
- Latest sample
- Jul 2026
more than 5% short
99.4%–99.9% range
first tested Aug 2025
Lab testing results
Independent results across 1 product.
4
Total lab tests
99.7%
Avg purity
99.9%
Best score
99.4%
Worst score
Tested products
| Product | Grade | Tests | Avg | Range | Latest | Price | $/mg |
|---|---|---|---|---|---|---|---|
| Retatrutide | EBAD | 4 | 50.0% | 99.4% – 99.9% | 7/10/2026 | — | — |
Individual lab tests
Retatrutide
Date
7/10/2026
Purity
—
Quantity
—
Lab
BTLabs
Vial
Silver label / Silver crimp / Blue cap
Retatrutide9.9
Date
6/12/2026
Purity
99.4%
Quantity
10 mg → 9.57 mg
Lab
Krause Analytical
Vial
Black label / Silver crimp / Red cap
Retatrutide10.0
Date
5/8/2026
Purity
99.9%
Quantity
30 mg → 26 mg
Lab
Krause Analytical
Vial
Black & White Label / Silver Crimp / Yellow Cap
Retatrutide10.0
Date
8/21/2025
Purity
99.89%
Quantity
10 mg → 10.6 mg
Lab
Krause Analytical
Vial
White Label / Blue Crimp / White Cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideSilver label / Silver crimp / Blue cap | 7/10/2026 | — | — | BTLabs | View | |
| RetatrutideBlack label / Silver crimp / Red cap | 6/12/2026 | 9.9 | 99.4% | 10 mg → 9.57 mg | Krause Analytical | View |
| RetatrutideBlack & White Label / Silver Crimp / Yellow Cap | 5/8/2026 | 10.0 | 99.9% | 30 mg → 26 mg | Krause Analytical | View |
| RetatrutideWhite Label / Blue Crimp / White Cap | 8/21/2025 | 10.0 | 99.89% | 10 mg → 10.6 mg | Krause Analytical | View |
Review summary
Summarised from 198 reviews
Based on 198 reviews, customers have shared their experiences with Certified Peptides. Reviewers overwhelmingly had positive experiences with this company, praising product quality and service.
What researchers are saying
AB
Angela Battle
11/27/2025
Trouble with delivery
I had the most trouble with delivery, but the best most perfect help from Jason with my order!!!! He personally called and immediately sent out another package without hesitation! Customer service, chef’s kiss! The product chefs kiss also!
MS
Michael Smith
11/27/2025
Trustworthy
Trustworthy
AS
Amy Stohlman
11/27/2025
Fast shipping, good product, well priced
Fast shipping good product well priced. I’ll order again.
AK
Apache Keawe-aiko
11/26/2025
LIFE CHANGING 💯
My whole life has been nothing but positive since being on RETATRUTIDE,for one thing my substance abuse thinking has gone silent,my drinking one or two beers and I don't want any more, my freaking brain actually feels like I'm getting smarter or sharper my thoughts and thinking are clearer almost like the movie limitless.just want to say thank you for giving me life again 🤙 ALOHA and MAHALO 🌴🌊😎
About Certified Peptides
Certified Peptides is a peptide vendor.
Contact
- US, WA 98579
- NUMBERS ARE LISTED ON WEBSITE
- certified-pep.com
Certified Peptides customer reviews
4.9
198 total
Top mentions
- Nov 27, 2025BH
Bucky Hon
Unknown
great products…
Dry great products and excellent customer service
- Nov 27, 2025AB
Angela Battle
Unknown
Trouble with delivery
I had the most trouble with delivery, but the best most perfect help from Jason with my order!!!! He personally called and immediately sent out another package without hesitation! Customer service, chef’s kiss! The product chefs kiss also!
- Nov 27, 2025MS
Michael Smith
Unknown
Trustworthy
Trustworthy
- Nov 27, 2025AS
Amy Stohlman
Unknown
Fast shipping, good product, well priced
Fast shipping good product well priced. I’ll order again.
- Nov 26, 2025AK
Apache Keawe-aiko
Unknown
LIFE CHANGING 💯
My whole life has been nothing but positive since being on RETATRUTIDE,for one thing my substance abuse thinking has gone silent,my drinking one or two beers and I don't want any more, my freaking brain actually feels like I'm getting smarter or sharper my thoughts and thinking are clearer almost like the movie limitless.just want to say thank you for giving me life again 🤙 ALOHA and MAHALO 🌴🌊😎
- Nov 26, 2025SM
Sophia Moreland
Unknown
I got my order a little late but love…
I got my order a little late but love the product so far. Great price and the customer service has been amazing.
- Nov 26, 2025KR
K Rod
Unknown
Tirzepatide 2.5mg
So this is my first time ever using a peptide and decided on Tirzepatide 2.5mg. It’s been 3 weeks and lost 10 pounds, it’s been amazing. I’ve had the normal side effects nausea, extreme loss of appetite and at times a bit of weakness because I needed to learn to have food in my stomach but to do it in small portions throughout the day. I love sweets but also have pre-diabetes which is one of the reasons I started to take it and my cravings for sugar have gone away 100% so far. I don’t have those urges of eating everything I see. The support you get constantly via the chat with experienced professionals who a lot of them are even taking the peptides themselves and are able to guide you from their own experience. Sarah, Rebecca to name a few have been AMAZING. You can ask as many questions as you want before ordering and once you’re on it. I felt very comfortable telling them about everything I was feeling and I have not been disappointed. It’s not like taking a drug to make you look skinny it’s something that besides losing weight helps you normalize your body more naturally and that’s huge for me. My desire is to lose 20-30 pounds so I’m continuing my journey and will come back to post some updates.
- Nov 26, 2025A
AMC
Unknown
Top notch customer service
Had an issue with first 2 deliveries which was not all their fault. Jason and staff were super quick to resend out the package and gave me a credit on my account. Have ordered from numerous sites that have disappointed but this one has been great. Products definitely are legit and are doing what they are supposed to do.
- Nov 26, 2025DH
David Halfon
Unknown
Great customer service
I've ordered 3 times now and the first two times everything was delivered quickly with no Issues. The third time things took a bit longer, 13 days to be exact and all my communications with Klarissa were excellent and extremely fast response no matter what time I emailed. You can't blame a company for the usps. If anything was wrong they were going to fix it but everything arrived perfect. I wasn't in a rush so the extra time wasn't an issue. Customer service is top notch
- Nov 26, 2025MG
Matt Groll
Unknown
Website was easy
Website was easy , shipping was fast. Haven't tried product yet. In the next couple weeks I will start
…
Showing 1–10 of 198 reviews