Last updated: May 2026. Pure Chain Aminos (PCA) is a US-based, COA-backed research peptide vendor. This page summarizes publicly reported information about Science.bio’s January 2026 closure and provides a continuity option for displaced research customers.
The short version
Science.bio voluntarily shut down on January 27, 2026, citing “regulatory compliance” as the reason. Unlike Amino Asylum’s enforcement-driven exit seven months earlier, Science.bio’s closure was a planned wind-down announced by the company. There is no successor brand. The storefront is offline.
If you were a Science.bio customer, you are now in the same position thousands of others are: you need a new vendor for the same compounds, with the same documentation discipline, that you can trust will still be there next year. Pure Chain Aminos is offering displaced Science.bio customers 20% off their first order over $75 with code WELCOME20.
WELCOME20 — 20% off, $75 minimum. Shop the catalog.
Timeline of the closure
Per coverage at OptimalHRT (optimalhrt.com) and consistent reporting elsewhere, the timeline is:
- Late January 2026 — Science.bio announces it will be closing voluntarily, citing regulatory compliance.
- January 27, 2026 — Storefront stops accepting new orders. Final fulfillment window is announced.
- Following weeks — Outstanding orders are fulfilled where possible; refund process is published for what cannot be shipped.
- Present — Site is offline. No successor brand has launched. No public restart plan.
The voluntary nature of the shutdown is a meaningful detail. Unlike a raid-driven closure (where the warehouse is sealed and customer service is unreachable), Science.bio went through a planned wind-down. That matters for what customers can recover.
What this means if you were a customer
- Last orders. Orders placed in the final ordering window were generally fulfilled or refunded per the published process. If you have neither shipment nor refund, your card issuer’s chargeback window applies (typically 60-120 days from the transaction date).
- Store credit / loyalty balances. Per the published wind-down communications, store credit was generally either applied to outstanding orders or refunded. If you had a balance and saw nothing, contact your card issuer to dispute the original purchases.
- Subscriptions / autoship. Verify on your card statement that any recurring charges have stopped.
- COA history. Once a vendor’s site is offline, the COA archive is gone. If you maintained long-running protocols based on Science.bio COA documentation, save any PDFs you previously downloaded.
Why customers are migrating to Pure Chain Aminos
Science.bio customers tended to be unusually documentation-conscious — they picked Science.bio precisely because of its COA discipline and its transparency about purity testing. PCA was built for the same buyer:
- COA per lot. Every product page links to the lab analysis for the lot in stock. Not a sample COA from a year ago — the current one.
- US fulfillment. Domestic shipping, no customs delays.
- Inventory model. PCA holds inventory for top SKUs in a domestic warehouse. The catalog reflects the warehouse.
- Research-only product mix. No compounded prescription mimics. No human-use marketing. Same disciplined product class boundaries that Science.bio observed.
- Live customer support. Pre-sales and post-sales questions get answered.
Top SKUs former Science.bio customers reorder first
- BPC-157 10mg — $59.99
- BPC-157 15mg — $89.99
- TB-500 10mg — $79.99
- GLP3-R 20mg — $224.99
- NAD+ 1000mg — $99.99
- MOTS-C 40mg — $139.99
- Ipamorelin 5mg — $49.99
Research resources
For background on the most-requested compounds: BPC-157, TB-500, GLP-3 Receptor, GLP-2-T, NAD+, MOTS-C, Retatrutide, plus the bacteriostatic water reconstitution guide.
How to switch over
- Pull your Science.bio order history from email — search “Science.bio order” — and list the SKUs you actually reorder.
- Match each one to the equivalent PCA SKU above (or browse the full catalog).
- Apply WELCOME20 at checkout for 20% off any order $75+.
- Save the COA PDF from each product page for your own records.
Ready to re-source? Use code WELCOME20 for 20% off orders $75+. Shop now.
See also
- What Happened to Science.bio? Background on the January 2026 Closure
- Science.bio Coupon Codes (No Longer Active) — Use This Instead
- Pure Chain Aminos vs Science.bio (Closed): Vendor Comparison and Migration Guide
Frequently asked questions
Is Science.bio coming back?
The closure was announced as voluntary, citing regulatory compliance, and there is no public restart plan or successor brand. Treat the brand as closed for planning purposes.
Did everyone get refunded?
The wind-down published a refund process for orders that could not be fulfilled. If you have not received either shipment or refund, your card issuer\’s chargeback window is the next channel (commonly 60 to 120 days from the original transaction date).
What about my COA history?
The Science.bio COA archive is no longer publicly accessible. If you maintained downloaded copies in your email or local files, hold onto them. For new lots going forward, PCA publishes the COA on each product page at the time of stock arrival.
Is Pure Chain Aminos affiliated with Science.bio?
No. PCA is an independent US-based research peptide vendor. We are not a successor brand and have no operational relationship to Science.bio.
How does WELCOME20 work?
Apply WELCOME20 at checkout. 20% off orders with a $75 or larger subtotal. First-order discount for new customers; one redemption per customer.
How PCA documents each lot
Each lot of each SKU goes through third-party HPLC purity testing and mass-spec verification before release. The resulting COA PDF is published on the corresponding product page. When a new lot arrives, the COA link updates. Older lot COAs remain accessible by request to customer support so long-running protocols can document chain of custody across batches.
Sources cited: OptimalHRT — https://optimalhrt.com/science-bio-closed-2026-best-alternative/.
Research peptides for laboratory use only. Not approved by the FDA. Not for human consumption. By purchasing, you confirm you are a qualified researcher operating in a controlled laboratory setting.