Peptide Sciences Review [2026]: Quality, Pricing, and Testing

Peptide Sciences is one of the most recognized names in the research peptide market. Based in Henderson, Nevada, the company has built a reputation over many years as a reliable source for USA-manufactured peptides. They are frequently mentioned in online forums, Reddit threads, and peptide community discussions.

But does brand recognition translate to the best value for researchers? We dug into their quality control, pricing, catalog, shipping, and customer experience to find out. This Peptide Sciences review is based on publicly available information, customer feedback from multiple platforms, and direct comparison against vendors we have already evaluated.

Company Overview

Peptide Sciences operates out of Henderson, Nevada and positions itself as a premium US-based research peptide supplier. The company has been active in the peptide market for over a decade, which gives them one of the longer track records among domestic vendors.

Their focus is exclusively on research-grade peptides. Every product page carries a clear “for laboratory research only” disclaimer, which is standard practice for legitimate peptide vendors operating in the United States. They do not sell SARMs, nootropics, or other compound categories.

The company manufactures peptides domestically, which they highlight as a quality advantage. US-based synthesis allows for tighter control over production processes and compliance with domestic regulatory standards. It also enables faster shipping to domestic customers, which is a clear operational benefit.

Product Range and Catalog

Peptide Sciences maintains one of the larger peptide catalogs in the industry. Their product selection spans several major categories:

• Tissue repair peptides – BPC-157 (available in 5mg, 10mg, and 15mg), TB-500 in multiple sizes
• Growth hormone secretagogues – CJC-1295, Ipamorelin, GHRP-2, GHRP-6, Sermorelin
• Anti-aging compounds – GHK-Cu, Epithalon, bioregulator peptides like Cortagen and Thymagen
• Sexual health peptides – PT-141 (Bremelanotide)
• Metabolic peptides – AOD-9604, 5-Amino-1MQ
• Peptide blends – BPC-157 + TB-500 blend, “Glow Blend” (BPC-157 + TB-500 + GHK-Cu)
• Capsule formulations – Oral BPC-157, Dihexa, Epithalon in capsule form

One notable gap: at the time of writing, Peptide Sciences no longer carries GLP-1 peptides such as semaglutide or tirzepatide. These were previously available but have been removed from their catalog. If your research involves GLP-1 receptor agonists, you will need to look elsewhere. Vendors like Core Peptides still carry semaglutide in their lineup.

The capsule product line is a differentiator. Not many peptide vendors offer oral formulations, and this gives researchers studying oral bioavailability an additional option. Their bioregulator peptide selection (Cortagen, Testagen, Thymagen) is also broader than what most competitors offer.

Quality and Testing Methodology

Peptide Sciences claims purity levels of 99% or higher across their peptide catalog. Each product batch comes with a COA that documents:

• HPLC (High-Performance Liquid Chromatography) purity analysis
• Mass spectrometry for molecular weight confirmation
• Peptide sequence verification
• Purity percentage measurements

These are the right tests. HPLC and mass spec are the gold standard methods for verifying peptide identity and purity. The question is not whether Peptide Sciences runs these tests, but who runs them. For a deeper understanding of what to look for in peptide testing, see our guide to peptide quality verification.

Internal testing provides useful quality documentation, and it is better than no testing at all. But it does not carry the same weight as results from an independent, accredited laboratory. When a vendor tests its own products, there is a built-in conflict of interest. This does not mean the results are inaccurate, but it does mean the verification layer is thinner compared to vendors that use third-party labs.

Several competing vendors, including Core Peptides and SwissChems, publish third-party COAs from independent laboratories. For researchers who prioritize external validation, this is a real gap in how Peptide Sciences handles quality verification.

Pricing Analysis

Peptide Sciences falls into the mid-to-premium pricing tier. Their prices are clearly listed on the website with no hidden fees, which is a positive. Here are some real examples from their catalog at the time of writing:

• BPC-157 5mg – $59.50
• BPC-157 10mg – $100.00
• BPC-157 15mg – $140.00
• TB-500 5mg – $85.00
• PT-141 10mg – $55.00
• AOD-9604 6mg – $65.00
• NAD+ products – priced at a premium (check site for current availability)

For context, BPC-157 5mg from competing vendors typically ranges from $35 to $55 as of early 2026. TB-500 5mg generally runs $42 to $65 elsewhere. Note: popular products like BPC-157 occasionally go out of stock at Peptide Sciences – check the site for current availability. Peptide Sciences sits at the higher end of both ranges.

They do offer a “Bundle and Save” promotion on select 20-vial bundles (10+10 configurations) that can reduce per-unit costs by roughly 15%. This makes bulk purchasing more competitive, but single-vial pricing remains on the expensive side.

Coupon codes circulate online and typically offer 10-15% discounts. Even with a discount applied, you are still generally paying more than you would at vendors like Core Peptides or SwissChems at their regular prices.

The absence of semaglutide and tirzepatide also limits their value for researchers working with GLP-1 compounds. Those products simply are not available here anymore.

Shipping, Packaging, and Handling

Shipping is the strongest part of dealing with Peptide Sciences. They offer same-day processing for orders placed before 12:00 PM PST, which is faster than the industry average.

Available shipping options include:

• USPS Priority Mail
• FedEx 2-Day
• FedEx Overnight
• FedEx Saturday Delivery (when available)

Orders over $200 qualify for free shipping, which is a reasonable threshold. The range of carrier options is broader than what many competitors offer, and the overnight option is a genuine advantage for time-sensitive research needs.

Packaging is professional and discreet. Products arrive in lyophilized (powder) form for maximum stability during transit. Customer feedback consistently mentions clean labeling and secure packaging as positives. For tips on handling peptides once they arrive, see our guide to reconstituting peptides.

Customer Service and Return Policy

This is where Peptide Sciences shows its most notable weakness. Customer service feedback across independent review platforms is mixed, with more negative reports than positive ones.

They offer support through email and phone during business hours. On paper, this is adequate. In practice, multiple users report slow response times, difficulty resolving issues, and limited flexibility when problems arise.

The return policy is strict: no refunds. Replacements are only issued for shipping errors, such as receiving the wrong item or a missing product. If you are dissatisfied with a product for any other reason, you are largely out of luck. This is more restrictive than some competitors who offer partial refunds or broader replacement policies.

For researchers ordering expensive peptides, a no-refund policy combined with inconsistent customer support creates real risk. This is worth weighing carefully, especially for first-time buyers.

Website UX and Ordering Process

The Peptide Sciences website is clean and functional. Product pages include detailed descriptions, listed pricing, and links to relevant research publications. Navigation is straightforward, and the checkout process works without unnecessary friction.

Each product page features references to scientific literature, which adds a layer of credibility and is helpful for researchers looking to understand the compounds they are purchasing. Not all vendors invest in this level of product documentation.

Payment options include credit cards and cryptocurrency. The site uses Cloudflare protection, which occasionally causes access issues for users on VPNs or certain networks, but this is a minor inconvenience.

Pros and Cons

Pros

• Long-standing reputation and brand recognition in the peptide market
• Large and diverse product catalog, including capsule formulations and bioregulators
• Transparent, clearly listed pricing with no hidden fees
• Fast domestic shipping with same-day processing before noon PST
• Multiple shipping carrier options including overnight delivery
• USA-manufactured products with domestic quality control
• Scientific references on product pages
• Free shipping on orders over $200

Cons

• Testing is internal, not verified by independent third-party labs
• Pricing is higher than most competing vendors for comparable products
• No refunds under any circumstances (replacements only for shipping errors)
• Mixed-to-negative customer service feedback on independent platforms
• GLP-1 peptides (semaglutide, tirzepatide) no longer available
• Discount codes max out at 10-15%, still leaving prices above competitors

How They Compare to Other Vendors

To put Peptide Sciences in context, here is how they stack up against three other vendors we have reviewed:

Peptide Sciences vs. Core Peptides

Core Peptides offers lower pricing on most comparable products, third-party tested COAs, and still carries semaglutide. Their catalog is more focused, but the quality verification is stronger. For most researchers, Core Peptides represents better overall value.

Peptide Sciences vs. SwissChems

SwissChems covers a broader product range that includes SARMs and nootropics alongside peptides. Their peptide pricing is generally lower, and they provide third-party lab testing. SwissChems is a better fit for researchers who need compounds across multiple categories.

Peptide Sciences vs. Paradigm Peptides

Paradigm Peptides is another US-based vendor with competitive pricing and third-party testing. They carry a similar range of peptides. Paradigm often edges out Peptide Sciences on price while offering comparable or better testing transparency.

For a full comparison of the top vendors, visit our best peptide companies guide.

Final Verdict: Is Peptide Sciences Worth It?

Peptide Sciences is a legitimate, established peptide supplier with a large catalog and fast shipping. They have earned their brand recognition through years of consistent operation and a professional online presence.

However, brand recognition alone does not make them the best choice. The lack of independent third-party testing, premium pricing, strict no-refund policy, and inconsistent customer service are real drawbacks that researchers should consider carefully.

If you prioritize fast shipping and brand familiarity, Peptide Sciences delivers. If you prioritize third-party verified purity, competitive pricing, and better customer support, there are stronger options available today.

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