Free shipping on every order — no minimum

Research peptides for labs and qualified researchers

Single peptides and blends, in vials and mists. Free shipping on every order, and orders paid before 12 PM PST ship the same business day.

For laboratory research use only.

Sigma Compounds gift boxes: the kit box with the red Sigma logo, and an open five-vial box
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What research clients say about working with Sigma

Ordering, fulfillment and support, in our clients’ own words.

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A selection of client reviews, word for word, names removed. Products are for laboratory research use only.

  • Get Peace of Mind with every order

    This is a solid company with excellent customer service and timely fulfillment and delivery of hard to find products. Here in the US and has a simple, transparent process that gives you peace of mind when ordering.

    Research clientUnited States

  • Professional and Secure

    Real professional site for research materials. Safe ordering system.

    Research clientUnited States

  • 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.

    Research clientUnited States

  • Very fast shipping and quick communication when I had a simple question.

    Research clientUnited States

  • Quality and thorough

    Website is easy to use. Information about products is thorough and complete. Large selection of products available.

    Research clientUnited States

  • Consistency you trust

    Always an easy and clear online ordering process. Great and trusted products.

    Research clientUnited States

  • A trustworthy company

    My order was shipped quickly. It contained everything I ordered and the packaging is very professional.

    Research clientUnited States

  • Reliable peptide supplier for all my needs

    Reliable peptide supplier with good product quality, fast shipping, and solid customer support. Great for research use!

    Research clientUnited States

  • Solid selection, quick shipping and customer service is top notch. Had an order issue and they corrected it with in a day. Didn’t have to run through a bunch of automated messages just to get put to the back of the line. Email was smooth and seamless. Great company

    Research clientUnited States

  • Excellent quality products, trust worthy company with great customer service and quick delivery. My first choice!

    Research clientUnited States

  • Highly Recommended

    Easy transaction and good communication. They will get more of my business, highly recommended.

    Research clientUnited States

  • 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.

    Research clientUnited States

  • High Recommend

    The website is very straightforward to navigate, delivery was prompt, and my order showed up in very professional packaging. I highly recommend Sigma Compounds.

    Research clientUnited States

  • Emailed to check Great Product with Fast Shipping !

    Emailed to check on some questions I had. Very responsive with easy answers. Shipping was on time, and the product was Fantastic ! Thank You !

    Research clientUnited States

  • Top quality!

    Great company to get your research peptides from. Top quality and fast delivery. You won't be waiting to get your research started.

    Research clientUnited States

  • Excellent service. Despite a shipping glitch (not the company's fault), they offered me a discount on the purchase of replacement items.

    Research clientUnited States

Purchase High Quality Peptides

About Sigma Compounds

What we supply

Sigma Compounds supplies research compounds to laboratories and research professionals in the US and Canada: lyophilized vials and mists, from single peptides to multi-peptide blends. Everything on this site is sold for laboratory and research use only.

What a listing tells you

Each title carries the compound, the quantity and the form, so two products that share a compound and a dose cannot be mistaken for one another. Stock is shown as it stands, and when something is out you can ask to be emailed when it returns. Our compounds are third-party tested, and the certificates we publish are in the COA Library.

More about us

Before you order

Who can order from Sigma Compounds?
Laboratories, institutions and qualified researchers aged 21 or over, buying for in vitro and laboratory research. Our products are not for human or veterinary use, and are not drugs, foods, supplements or cosmetics. You confirm this when you first visit the site, and again at checkout.
How fast does my order ship?
Orders placed and paid before 12 PM PST, Monday to Friday, ship the same business day; later orders ship the next business day. Shipping is free on every order, with no minimum. US orders typically arrive within 3–5 business days and Canadian orders within 7–14, and you’ll get a tracking number by email when your order ships. More on our Shipping page.
Are your products tested? Where are the COAs?
Our compounds are third-party tested. Every certificate of analysis we publish is in our COA Library and on the product’s own page, with the testing lab and the date it was reported. For a product without one, or a question about a report, email support@sigmacompounds.com.
How can I pay?
We accept major credit and debit cards through secure checkout. Card charges appear on your statement as SIGMA.
Do you have a rewards program?
Yes. Every order earns 1 point per $1, and every 20 points take $1 off a later order. Points never expire. Order 3, 5 or 10 or more items together, in any mix, and checkout takes 5%, 10% or 15% off; supplies and stacks don’t count toward it. Refer a friend and they get $15 off their first order of $75 or more. Details on our Rewards page.
What if something is wrong with my order?
Email support@sigmacompounds.com with your order number and a real person will help. If an item arrives damaged or differs from what you ordered, tell us within 30 days of delivery, with photos, and we’ll review it and send return instructions (unopened items only). Because these are research compounds, other sales are final. Full details on our Refund Policy.

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