# Expired Oath Peptides Promo Codes > A running list of old Oath Peptides promo codes that no longer work at checkout, with roughly when each one stopped applying, so you stop retrying a dead code. ## Expired Oath codes Codes carrying the Oath Peptides name have circulated for well over a year, and most of what's still being shared today no longer applies at checkout. Below is a specific list of which ones are dead and roughly when each one stopped working. | Code | Offer | Expired | Status | | --- | --- | --- | --- | | `PEPTIDES20` | 20% off sitewide | 2026-03-05 | Expired | | `OATHPEP10` | 10% off any order | 2026-01-22 | Expired | | `VIALSAVE` | $15 off orders over $150 | 2025-11-14 | Expired | | `LABVAULT12` | 12% off sitewide | 2025-08-19 | Expired | Promo codes tied to the Oath Peptides name have been shared, copied, and reposted for a while, and most of what's still floating around no longer works. That's ordinary code lifecycle, not evidence of anything unusual — retailers retire codes on a schedule, tie some to specific campaigns, and let others lapse once a promotion period ends. The table below lists codes that circulated under the Oath Peptides name and roughly when each one stopped working, so you can stop retrying something that simply isn't live anymore. None of the codes below are still active. They're listed for reference, not because any of them will work at checkout today. If you want a code that actually applies right now, the homepage tracks two, kept current against Oath's live checkout rather than an old list. ## Why old codes keep getting shared A promo code doesn't stop circulating just because it stops working. Screenshots get saved, forum threads stay indexed, and old coupon-aggregator pages rarely get updated once nobody's actively maintaining them — so a code that died months ago can still show up in a search result today with no indication it's dead. That's the gap this page exists to close: a short, specific list of codes that once carried the Oath Peptides name and are confirmed no longer active, rather than a guess based on how old a post looks. If a code isn't listed in the table above and isn't one of the two active codes on the homepage, treat it as unverified rather than assuming either way — the surest test is simply trying it at checkout, where Oath's own cart will report a rejection immediately, one way or the other, without leaving you to guess at what happened. ## What these dates mean Each date in the table marks the point a code was last confirmed to apply at checkout, not necessarily an official retirement announcement — Oath doesn't publish a public changelog of its own past promotions, so there's no single canonical source that states the exact day a given code was switched off. Treat the dates as a reliable marker of when a code stopped working, not as a press release from Oath itself. That distinction is also why you might see a slightly different expiration date for the same code on a different site: nobody is drawing from one shared official list, because Oath doesn't keep one publicly. What matters more than reconstructing an exact promotional history is the simpler, more useful question — whether a code works right now. That's the question this page and the homepage both answer directly, and it's the one worth checking before you rely on any expiration date you read anywhere, including this one. ## Checking a code yourself If you're holding a code that isn't listed here, the fastest way to find out whether it's alive is also the most reliable one: add something to your cart at [oathresearch.com](https://oathresearch.com) and try the code in the coupon field. The order total either drops or it doesn't, and Oath's checkout reports a rejection immediately rather than accepting a dead code silently. This page can't track every code that's ever been typed into a checkout box somewhere on the internet, and we're not going to guess at ones we haven't confirmed either way. What we do keep current, checked against Oath's live cart, are the two codes on the homepage — a shorter, more reliable list than trying to keep pace with everything that's ever circulated under either the Oath Peptides or Oath Research name. A code that fails both here and at checkout is simply gone for good, not temporarily broken. ## Ready to use a code? Copy either code above, then paste it into the discount field at checkout. The 20% code is for first orders; the 15% code works every time. Shop Oath Research: --- This page exists to explain a name change and track two working discount codes, not to give research-use advice or earn a commission on anything you buy. © 2026 Oath Peptides Promo Codes. Tracks two active Oath Research discount codes; earns no commission on either.