Frequently asked questions

No. All 20 Aminos products are supplied for laboratory research use only. They are not for human or animal consumption, and not for diagnostic or therapeutic use.

Every lot undergoes HPLC purity analysis, ESI(+) mass-spectrometry identity confirmation, and endotoxin (LAL) screening before release, with a certificate of analysis issued per batch. See Quality & methodology below for the full protocol.

Minor cosmetic variation between lots is normal for lyophilized peptides and does not indicate reduced quality — every lot is still released against the same HPLC, mass-identity, and endotoxin criteria.

Products are supplied as a lyophilized (freeze-dried) powder for stability during storage and transit.

Vial cap color may vary by lot and packaging run. It is not an indicator of product identity or quality.

A lyophilized cake may crack or shift in appearance during transit. This is a cosmetic effect of freeze-drying and shipping, not a quality issue.

Store cool and dry, away from heat, moisture, and direct sunlight. Refrigerate or freeze at approximately −20°C. Lyophilized lots are stable for at least 24 months from the release date when stored at the recommended temperature.

Brief excursions above the recommended storage temperature, followed by prompt return to proper storage, typically do not cause measurable degradation. Prolonged exposure to heat accelerates degradation and should be avoided.

Every 20 Aminos lot passes a standardised six-stage analytical QC protocol before release. Certificates of analysis are issued per batch as each lot is released, naming the laboratory and analyst of record for that batch. The stages are summarised in the questions below.

Incoming lots are quarantined on receipt and assigned a batch ID. No lot enters the active inventory before QC release.

Reverse-phase HPLC analysis using a C18 column and UV detection at 220 nm. Gradient optimised per compound class. Reported purity is the value on that lot’s certificate of analysis — not a site-wide guarantee.

Electrospray ionisation mass spectrometry (positive mode). Measured monoisotopic mass compared to theoretical value. Acceptance criterion: Δ < 0.05 Da.

Limulus Amebocyte Lysate (LAL) assay per USP General Chapter <85>. Endotoxin limit: < 1 EU/mg. Kinetic turbidimetric method.

Each released batch is assigned a batch record. A certificate of analysis is issued per batch, signed by a named analyst. PDF archived on the platform and linked to the product listing.

Lot is released to inventory only after all QC criteria are met and the COA is signed. Lots that fail any criterion are quarantined for investigation.

Each released batch has a COA that names the laboratory, analyst, and sign-off for that lot. Browse the COA archive or open the COA link on a product page when a document is on file for the selected lot.

Monday–Friday, 9:00 AM–6:00 PM ET, and Saturday 1:00 PM–3:00 PM ET.

Orders are typically processed and shipped within one to two business days. Standard shipping is UPS/FedEx with an estimated 2–5 business day transit; FedEx Overnight and FedEx Priority Overnight are available at checkout. These are carrier estimates, not guarantees.

You'll receive a confirmation email with tracking information once your order ships. Tracking is also available under My Account → Orders.

We currently ship to the United States and U.S. territories only.

Order changes and cancellations are only possible within a limited window after checkout. Please review your shipping address carefully — incorrect entries are the customer's responsibility.

Carrier delays are outside our control and shipping fees are non-refundable for late delivery. If your order shows as delivered but you haven't received it, check with neighbors and the carrier directly, and allow up to a week before contacting us.

Every order is documented and photographed before it ships. Report missing or incorrect items within 7 days of delivery, or damaged items within 2 days, and include photographs.

20 Aminos is not responsible for packages stolen after delivery, lost in carrier transit, or sent to an address entered incorrectly at checkout.

FedEx (800) 463-3339 · UPS (800) 742-5877.

Payment Pending — payment has not yet cleared. On Hold — the order is under review before processing. Processing — the order is being prepared for shipment. Completed — the order has shipped. Cancelled — the order will not be fulfilled.

Registered users can view order history under My Account → Orders. Guest orders become visible once you create an account using the same email address used at checkout.

Check your spam or junk folder first. Contact support@20aminos.com if it still has not arrived.

Use the password reset option on the My Account sign-in page.

All sales are final unless a documented quality issue is confirmed by our QC team. If you receive a damaged, defective, or incorrect item, contact support@20aminos.com within 48 hours of delivery with photographs; approved claims receive a replacement at no cost. See our refund policy for full details.

20 Aminos maintains a strict zero-tolerance policy for misuse of its research products. Support is limited to order, shipping, and payment matters — we cannot provide guidance for any research task or intended application.

Orders are screened for regulatory compliance. Suspected misuse of a research product may result in permanent removal from our customer list.

Credit and debit cards are accepted. Contact us if you experience checkout issues and we'll provide a secure checkout link.

Contact support@20aminos.com and we will help resolve it.