The best in Peptides
The best in Peptides
By Luis C.
Tuesday, November 3, 2026 · Customer reviews of US businesses

The Fair Hearing score
Excellent
120 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
Sigma Compounds stands at the forefront of the research peptide industry, offering premium peptides. We have established strong partnerships with manufacturers who ISO 9001:2008 standards, allowing us to offer our clients exceptional pricing without compromising on quality or purity. Our commitment to delivering top-notch products ensures that we remain a reliable resource for the scientific community, and we are delighted to share these savings with our valued customers
Sigma Compounds (sigmacompounds.com) has 120 customer reviews on The Fair Hearing, with an average rating of 4.9 out of 5.
120 approved reviews, newest moderated first
The best in Peptides
By Luis C.
Through my personal experience the measure of a business is not just about delivering a superior product but also engendering implicit trust even when unforeseen circumstances occur. Sigma Compounds is the organization that will put a smile on the customer's face because a happy customer becomes the best public relations advocate that money can't buy, cheers.
By dabronks
Good company, great experience. Easy shopping process very helpful.
By Balint S.
I've been connecting the dots between Sigma Compounds and the books published prior. One thing's rang true throughout my experience which is that I've truly felt they were on a mission to bring these products to researchers new and or experienced.
By TexiCali
Competitive prices , great service and fast shipping!
By Gerald H.
Sigma has been amazing to work with and has high quality peptides for our research purposes. Customer service is amazing and quick to reply when I had a question.
By Kimberley T.
The company has great customer service and great product and fast shipping. I will be re-ordering from them.
By customer
I had previously written a negative review because my order had been lost by the USPS and I wasn't getting the support I felt I needed. Then I realized they're a small company and wearing many hats. They are working diligently to find my order, or they'll send a new one out. That's the support and customer care I need from the companies I support and use.
By Ross