The questions we get most often. If your question isn't here, reach out through contact — we answer every message within one business day.
High-risk card processing (3.5% fee), cryptocurrency (BTC/ETH/USDC, 1% fee), and ACH/wire (no fee, 1–2 day delay). Standard processors like Stripe and PayPal prohibit research chemical merchants, which is why you won't see them at checkout.
Yes. Guest checkout is supported. You'll still receive order confirmation emails and COA attachments, but you won't have a login to review order history later.
Yes. For orders over $2,000, over 10 vials of a single compound, or institutional purchasing, reach out to research@peptidebros.shop for pricing.
If the order has not yet been lot-assigned (first ~24 hours), yes. Contact support quickly. After lot assignment, changes are more difficult but we'll do what we can.
It means the compounds are sold as chemical reference materials for in-vitro laboratory research — not as drugs, not as medicines, and not for human or animal consumption. All of our compounds are HPLC-verified and shipped in discreet, tamper-evident packaging, but they are not FDA-approved therapeutic products.
No. We supply research compounds and describe the literature around them. We do not recommend dosing, timing, combinations, or administration protocols. That's outside our scope and, in the research-grade context, outside what's legally appropriate for us to do.
From qualified synthesis partner laboratories operating under standard peptide synthesis practices. Each incoming lot is independently verified by a 3rd-party analytical lab (STERIS Labs, Alcami Analytical, or equivalent) before release.
Most compounds are in stock. Rare-demand compounds may have 5–10 day lead times as we order in small lots to maintain freshness. If a compound is backordered, you'll see that on the product page and your order will be held until the next lot releases.
Use the COA Lookup page. Enter the lot number printed on your vial label — the full Certificate of Analysis will pull up, including HPLC purity, mass spec identity, endotoxin, bioburden, and sterility test results.
We rotate among several US-based independent analytical labs (STERIS Labs, Alcami Analytical, and occasionally others) to avoid any single-lab concentration risk. The specific lab for your lot is named on its COA.
Yes, for a small administrative fee. Email research@peptidebros.shop with your lot number. Raw data is typically available within 2–3 business days.
Contact us immediately with your test results. If the lot fails its release spec in a legitimate independent test, we replace it free of charge or issue a full refund.
Orders ship within 48 hours of payment clearance. Domestic US delivery typically 2–3 business days after dispatch. International: 5–14 days depending on customs.
No. Lyophilized peptide powder is stable at room temperature for typical transit windows (days to weeks), which is why research-grade vendors ship this way — cold-chain logistics add cost without meaningful stability benefit for powder form. Orders ship at ambient temperature in discreet, tamper-evident packaging with carrier tracking. Refrigerate (2–8°C) on receipt.
Lyophilized peptides: refrigerate unopened at 2–8°C, protected from light. Once reconstituted, most peptides are stable at 2–8°C for approximately 28 days. NAD+ is more storage-sensitive — refer to the NAD+ product page for specifics. Never freeze reconstituted peptide solutions.
We evaluate international orders case-by-case based on destination regulations. Orders to jurisdictions where research chemical imports are restricted are refused and refunded. Current list of supported international destinations is available at checkout.
Generally yes for the compounds we carry, when purchased and used for legitimate in-vitro laboratory research. None of our compounds are scheduled controlled substances. However, federal and state regulations vary, and specific compounds or applications may be restricted in your jurisdiction. You are responsible for compliance with applicable law.
We require acknowledgment of our Research Use Policy at the age gate and at checkout. For bulk/institutional orders or specific restricted compounds, we may request additional documentation. By placing an order, you attest to being a qualified researcher 21 or older.
We comply with valid legal requests. We do not proactively share customer data with government agencies. See our Privacy Policy for details.
PeptideBros was founded in early 2026. We are an independent operation based in Texas, USA.
The research chemical space attracts attention we'd rather direct at product quality. We prioritize operational transparency (COAs, lot tracking, company registration) over personal publicity.
Use the contact form or email support@peptidebros.shop. Response time is typically under 24 business hours.