FAQ
Longevity Stack FAQ — purity, COA, storage, shipping, payment
Updated 2026-06-04 · X Factor Peptides
Is Longevity Stack from X Factor Peptides Research Use Only?
Yes. Longevity Stack ships exclusively for laboratory research use. Buyers must attest to age 21+, RUO use, and our Terms at checkout. Not for human consumption.
What purity is Longevity Stack?
Catalog release threshold is ≥98% area purity by HPLC. The actual lot purity is printed on the vial label and on the per-lot certificate of analysis. Verify any lot at /lookup by entering the lot number.
Does every vial include an HPLC chromatogram?
Yes. Every released lot ships with a per-batch chromatogram, mass-spec confirmation, and a release signature. The same report is publicly searchable at /lookup and indexed at /coa/. No login.
How should I store Longevity Stack?
Lyophilized at −20°C, Longevity Stack is stable through the printed expiry date. At 2–8°C, shelf life shortens to ~6 months. After reconstitution with bacteriostatic water, store at 2–8°C and use within 30 days.
How fast does Longevity Stack ship?
Orders ship next business day from Maryland via USPS Priority or UPS Ground. Free shipping on orders over $200. US only.
What payment methods are accepted?
Cryptocurrency via Coinbase Commerce (BTC, ETH, USDC, USDT) and ACH/wire for institutional accounts. Credit cards are not accepted for RUO orders.
What if my lot fails my independent re-test?
We hold a −80°C reserve aliquot of every released lot for 24 months. Email [[email protected]](mailto:[email protected]) and we re-run analytical HPLC against the reserve at no charge.
Can I cite Longevity Stack in a paper?
Yes. Use our citation generator for APA, AMA, BibTeX, MLA, and Chicago.
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