Peptide Sciences, one of the more well-known US research peptide vendors, shut down operations on March 6, 2026. Researchers who relied on them for BPC-157, semaglutide, tirzepatide, and similar compounds have since been looking for alternatives that match or exceed what Peptide Sciences offered. This page covers what mattered about Peptide Sciences, what changed with their shutdown, and what to look for in a replacement vendor.
If you’re coming here specifically because you used Peptide Sciences and need to find a new supplier, the key question is: what quality signals actually differentiate vendors? Price is easy to compare. The harder comparisons involve testing methodology, documentation practices, payment options, and reship policies — the things that matter when something goes wrong.
What Happened to Peptide Sciences
Peptide Sciences announced their closure on March 6, 2026. The announcement was abrupt, and researchers who had store credit or pending orders were left without a clear resolution process, as the company offered no refund path for outstanding balances.
The shutdown wasn’t unusual in this niche. Research peptide vendors have historically operated in a challenging environment with respect to payment processing — mainstream credit card acquirers and PayPal often terminate accounts in this product category, forcing vendors to rely on limited payment infrastructure. When that infrastructure becomes unstable, businesses in this space can close quickly.
For practical purposes, Peptide Sciences no longer accepts orders. This page focuses on what to look for when evaluating their replacements, using both what Peptide Sciences did well and where there was room for improvement as a framework.
What Peptide Sciences Did Well (and Where Gaps Existed)
Peptide Sciences built a solid reputation over several years for product consistency and reliability. Community forums generally report positive experiences with their compounds, particularly for BPC-157 and TB-500. They maintained a professional website and offered a reasonable product range.
The main criticism that surfaced in community discussions was their COA methodology. Peptide Sciences’ documentation appeared to rely on internal testing rather than independent third-party analysis. For researchers who view independent lab verification as a baseline quality requirement, this was a limitation.
The distinction matters because internal testing, while not inherently unreliable, lacks the external accountability of third-party analysis. When an accredited independent laboratory like Janoshik Analytical tests a batch, the results are tied to a traceable submission in that lab’s records. A vendor testing their own product has no independent check on the results.
Peptide Sciences also did not offer a documented customs reship guarantee. For US researchers, this was generally not an issue since domestic shipments rarely encounter customs. For Canadian researchers or anyone ordering across borders, the absence of a reship policy created risk that the vendor didn’t absorb.
What to Look For in a Peptide Sciences Alternative
Third-Party COA Verification
The most important quality signal in this space is whether a vendor uses independent third-party laboratory testing and whether that testing is match-batch: meaning every production lot gets its own COA, not just the first lot tested and then reused. Janoshik Analytical is the most credible testing lab for this purpose, and their task numbers allow the submission to be traced back to the lab’s records.
Bastion’s approach to COA documentation uses Janoshik per-lot testing with batch codes that match the product label. Researchers can cross-reference their vial’s lot against the Lab Results page, which lists each compound’s batch entries. For a detailed explanation of how match-batch verification works and how to read a Janoshik COA, see the match-batch verification guide.
Payment Options
Payment acceptance is a practical differentiator in this niche because most vendors operate with limited payment infrastructure. Researchers who have had their orders declined, held, or flagged by mainstream payment processors know how frustrating this can be.
Bastion accepts credit card, PayPal, and cryptocurrency (USDT TRC-20 and others via NOWPayments). Accepting all three is uncommon in this space. Most vendors fall into one of two categories: those that accept only crypto, and those that accept only credit card through specialized processors. Having multiple options reduces the friction of getting an order placed.
Shipping Coverage and Reship Policy
US researchers are generally well-served by any domestic vendor, but researchers in Canada face higher seizure rates at the border than in the US. A vendor without a customs reship guarantee shifts that risk entirely onto the buyer.
Bastion provides free customs reship to both US and Canadian addresses. If a shipment is seized at customs, a replacement ships at no additional cost. This is worth confirming directly for any vendor you’re evaluating, as policies can change and are not always prominently advertised.
Product Range and Compound Availability
Peptide Sciences offered a broad catalog. When evaluating alternatives, confirming that the specific compounds you need are available matters more than overall catalog size. Key compounds to confirm availability for:
- BPC-157 and TB-500 (most requested recovery compounds)
- GLP-1 class compounds: semaglutide, tirzepatide, retatrutide
- Growth hormone axis: ipamorelin, CJC-1295, sermorelin, GHRP-2
- Cognitive/neuropeptide class: semax, selank, pinealon
- Longevity compounds: epithalon, NAD+, MOTS-c
Bastion’s catalog includes all major categories from this list. The full product range is available at the compounds page.
Side-by-Side Comparison
| Feature | Peptide Sciences (pre-shutdown) | Bastion Peptides |
|---|---|---|
| Status | Closed March 2026 | Active |
| COA testing | Internal (not independently verified) | Third-party Janoshik per lot |
| Batch matching | Unclear from public documentation | Batch number on COA matches vial label |
| Credit card | Yes (pre-shutdown) | Yes |
| PayPal | Unconfirmed | Yes |
| Crypto | Unconfirmed | Yes (USDT TRC-20 + others) |
| US shipping | Yes | Yes |
| Canada shipping | Yes (no reship guarantee found) | Yes + free reship if seized |
| Refunds | Replacements only, no refunds | See refund policy |
The cells marked “unconfirmed” reflect that no public documentation confirmed those Peptide Sciences policies before their shutdown. This table is based on publicly available information and community reporting; it does not represent claims about internal policies that weren’t publicly disclosed.
How Bastion Approaches Documentation Differently
The COA documentation gap is worth expanding on because it affects how you interpret results. When a vendor tests their own material in-house, you’re relying entirely on their integrity and competence. There’s no external organization whose reputation is attached to the results. The vendor controls what gets reported and what doesn’t.
When an independent lab tests a batch, the results are tied to that lab’s accreditation and reputation. Janoshik Analytical runs HPLC for purity and LC-MS for identity on each submission and assigns a task number. The task number is the lab’s internal tracking reference — it means the submission can be looked up in their system, and Janoshik can confirm whether a specific task number actually exists in their records.
Bastion publishes COA documentation for each compound on the Lab Results page, including the batch code, purity result, and Janoshik task number. When a new lot arrives, it gets tested before it ships. The COA for lot 2026-04 is different from the COA for lot 2025-11. This is what match-batch means in practice: the document on the product page corresponds to the material in the vial, not to a reference sample from months or years earlier.
For a researcher evaluating vendors after Peptide Sciences’ closure, this is one of the clearest ways to compare what’s actually different between a vendor who treats COAs as a checkbox and one who treats them as a genuine quality signal. The documentation is either tied to your specific lot or it isn’t. If you can’t match a lot number on the COA to the lot on your product, the COA is partial evidence at best.
Frequently Asked Questions
Did Peptide Sciences have a refund policy?
Peptide Sciences offered replacements for incorrectly shipped or incorrect orders but did not have a standard refund policy. When they shut down in March 2026, there was no documented process for refunding store credit or pending orders. Customers with outstanding balances at the time of shutdown did not receive refunds according to community reports.
Was Peptide Sciences’ testing legitimate?
Community feedback on Peptide Sciences’ compounds was generally positive. The concern wasn’t that their products were bad, but that their COA documentation relied on internal testing rather than independent third-party analysis. Internal testing can be rigorous, but it lacks the external accountability of having an accredited outside lab verify the results. For researchers who require independent verification, this was a documentation gap rather than evidence of a product problem.
What compounds did Peptide Sciences carry?
Before shutting down, Peptide Sciences offered a broad catalog including BPC-157, TB-500, ipamorelin, CJC-1295, semaglutide, tirzepatide, epithalon, and most commonly researched peptides. Most of these are available through Bastion and other active vendors in the space.
Is there any way to still order from Peptide Sciences?
No. Peptide Sciences shut down operations on March 6, 2026 and is no longer accepting orders. Any website claiming to be Peptide Sciences after that date warrants scrutiny, as the brand could be spoofed by bad actors targeting their former customer base.
What’s the best Peptide Sciences alternative for Canadian researchers?
Canadian researchers face higher customs seizure rates than US buyers, so the reship policy matters more. Bastion offers free customs reship to Canada, which Peptide Sciences did not document publicly. For researchers in Canada who experienced customs issues with Peptide Sciences orders, the reship guarantee changes the risk calculus significantly.
How do I verify the quality of a new vendor before ordering?
The key checks: does the vendor use third-party testing (not internal only)? Is the testing match-batch (new COA per lot, not one COA reused forever)? Can you see the actual batch data before ordering? Community review threads on r/peptides and related forums often have current feedback on active vendors. For understanding how to read and verify a COA from any vendor, see the COA verification guide.