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Peptide Critic

No Hype. Real Reviews. Informed Peptide Decisions.

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Top-Rated Vendors

Lab‑Tested Unbiased Scoring Third Party Tested
Premium Vendor

Genpeptide

5.0 (10)
peptidecritic (10% off)

Good quality. Professional packaging

"Boris my lab mouse, received his first shipment of his 50 mg. vile of GHK-CU. He was excited and pleased with the pricing, and fast shipping Genpeptide offer…"

— Rodney

Great customer service

"I ordered from GenPeptide for the 1st time and was happy to see how fast they shipped my order. Among the research peptides I purchased, I ordered a 5 vial …"

— DG

Excellent Customer Service

"Ordered N-Acetyl Semax and order was shipped and arrived within two working days. They accidentally shipped N-Acetyl Selank (easy mistake) and I contacted th…"

— elijahkpaugh

Top Popular Research Peptides

GLP3-R

Weight Loss
$3.00 - $13.00 /mg
64 vendors

GLP2-T

Weight Loss
$0.30 - $21.60 /mg
65 vendors

MOTS-c

Longevity
$1.63 - $7.00 /mg
80 vendors

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Research Peptide Pen V3.5

Upgrade your research setup with the Reusable Peptide Pen V3.5 built for researchers who loved the t...
$27.99
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Xulin Pen 3 Blue + Case

If you want a true manual injector pen that feels like a piece of equipment (not a toy), the Xulin P...
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Research Peptide Pen V4 Bronze product image

Research Peptide Pen V4 Bronze

Upgrade your research setup with the Bronze Reusable Peptide Pen V4—a refined evolution of the origi...
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Latest from the Blog

News, guides, and insights from the peptide research community

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Latest Reviews

Recent feedback from the research community about vendor experiences and product quality.

Raffav008

GLP3-R kit

I am very please with this product. It has changed my life. The 10 vial kit did not take long to come in. They have good rep for testing if you dont want to buy direct and then have to send for testing. I am already planning another order. I also have asked and working with customer service and it has been a great experience. I am new this and highly recommend them.
DRTasCanB

A+ Shipping/A+ Results

Excellent experience all the way around. Extremely fast shipping. Packaging is also very professional. The 12mg NXP-3R (Reta) purity is excellent, and while some might not agree, but I am 100% ok with the overfill, the COA that's posted on the site falls in line with the blind test done by users of the same batch.
I encourage people that are using Nexaph to join their telegram chat. Honestly, the amount of transparency is top tier. I also purchased N-acetyl semax amidate, and will post soon on how the research goes. The hype is legit about Nexaph. As always though, be smart and give researching the company your due diligence. I have been using another vendor for Reta, and was very pleased with them, but....at a much higher cost, even in bulk than Nexaph....and ..the research results of Nexaph Reta has broke the plateau... I can't see any reason at the moment to go anywhere else, as I buy in bulk anyways.

Happy Researching,
DRTasCanB
MomTrying

So happy to have found Nexaph!

So happy to have found Nexaph! I've used a couple of other vendors before and I've had great results overall with the vendors and purchases. When I first found peptide critic and was going through the different vendors, I remember looking at Nexaph thinking, that my other place was a little less expensive. I swear I'm not a stupid person but it took me a minute to realize I was buying 10 vials for the price of one. This place has been so easy to use. I get things quickly and the prices are really good.
ValGal

Fast shipping with A lot of communication.

First order from Southern Aminos. Lots of communication with really fast shipping. Looking forward to researching their products
RagnatLothbrok

Great quality and 2-day shipping

Just got my order from June 6th, insanely fast shipping (got it today June 8th). Credit card payment went through on the website without any issues. Every vial has its own batch number linking straight to the COA library, and you can verify the access code yourself at ILS Labs. Also, worth mentioning that the labs were done in April and May.
Honestly, I don't know what happened with the other reviews, but this is my second time buying and zero complaints so far. Great prices and quality, so going to keep ordering from them.
Rusty Kiosk

Cloudy Poor Product

I purchased two vials of glp3 for research and reconstituted with pharma grade BAC for one and one purchased through Flawless. Both vials reconstituted cloudy. During the research, the product appeared to be ineffective. Switched back to another brand and felt a night and day difference. Bad batch? Who knows. When I contacted the company, they told me they would only compensate me on one vial. Research at your own risk.