They're Great
This has been the best company for reliable peptides.
About Sigma Compounds
Data updated- Website
- sigmacompounds.com
- Category
- Construction & Manufacturing
- Location
- United States · Overland Park
- Status
- Unclaimed
- Last 12 months
- 60 reviews
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Is Sigma Compounds legit?
Sigma Compounds (sigmacompounds.com) has a 5.0 out of 5 rating on OK.one, based on 61 user reviews collected here. It is listed under Construction & Manufacturing and its reputation is excellent. Praise is nearly unanimous, with 100% rating it 4 stars or higher; 60 of them were added in the last 12 months. Last updated 2026-08-10.
What people say
Only place I buy
Great customer service, top quality peptides with great shipping time! Definitely recommend!
Sigma Compounds Above All
After purchasing from numerous vendors, Sigma Compounds stands head and shoulders above the rest. Their product quality is unmatched, their presentation is exceptional, and their customer service sets a new standard. They’ve earned my trust — and my business — for life.
Order came quickly and works…
Order came quickly and works phenomenal. I have placed 2 orders so far as well as my son and we are getting ready to make another order soon. Awesome company!
Sigma Compounds is 5 star worthy
Sigma Compounds is my go to company for researching peptides in Ehlers-Danlos Syndrome. All of the products are quality tested and I trust them fully. Matthew and/or Customer Service are easy to contact and reply promptly when I have had a question. Ordering is simple, the website is easy to navigate to find exactly what you need. Order fulfillment & shipping are prompt, products come beautifully & safely packaged, sealed, & sterile. I would only buy peptides from Sigma!
Sigma Compound is the best research…
Sigma Compound is the best research peptides company in the world and U.S. the books are top notch and extremely helpful "Peptides made simple usage, dosing, cycling and reconstitution encyclopedia. 10 out of 10 stars.
A trustworthy vendor!
A trustworthy vendor, fast shipping, reliable payment methods, and high-quality products. There are many peptide compound companies out there to choose from with flashy sites and crazy branding - don't waste your time gambling! Sigma is a legit supplier, and a reliable compound manufacture with consistent adn potent peptides.
The best in Peptides
My trust was earned
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.
Great
Good company, great experience. Easy shopping process very helpful.
Connecting the dots
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.
Competitive prices
Competitive prices , great service and fast shipping!
Sigma has been amazing to work with and…
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.
The company has great customer service…
The company has great customer service and great product and fast shipping. I will be re-ordering from them.
Good follow up
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.
Quality and thorough
Website is easy to use. Information about products is thorough and complete. Large selection of products available.
Revived me
My mitochondria has been revived from the dead! Went from feeling sluggish and tired to full of energy the whole day. Genuinely life changing.
I have loved the packaging and quick…
I have loved the packaging and quick shipping. Somewhat good pricing but I know its a trustworthy product. I also like the coupons offered!
Fast quick safe delivery
Fast quick safe delivery ! I’m on My third order …glad to be part of the sigma team
Customer service is good
Customer service is good, with a quick response. They are thorough in their care of their products, using sturdy and secure boxing. The quality is a step above the rest, and I feel I can trust their products.