# Date Check Notes
> Probiotics are live products, so dates matter. A short guide to expiry, best-by and what happens after the date on the bottle.

## Guides
- [Best-By vs Expiry on Supplements](https://supplement-shelf-life-check.pages.dev/best-by-vs-expiry/): Best-by and expiry dates are not interchangeable, and the difference matters when you are choosing a product.
- [Using Expired Probiotics: What to Know](https://supplement-shelf-life-check.pages.dev/expired-probiotics-safe/): Nobody can tell you from a web page whether a particular out-of-date bottle is fine, and we will not guess.
- [Opened vs Sealed Bottle Life](https://supplement-shelf-life-check.pages.dev/opened-vs-sealed-bottle-life/): A printed date usually describes an unopened bottle kept as the label directs, and an opened one may behave differently.
- [Using Older Bottles First](https://supplement-shelf-life-check.pages.dev/rotating-older-bottles-first/): Rotating older bottles first means using the bottle with the earlier date before a newer one, so no supplement sits unused until it is past its label date.
- [Disposing of Old Supplements Safely](https://supplement-shelf-life-check.pages.dev/disposing-old-supplements/): The safest approach to disposing of old supplements is to check local household waste guidance, ask a pharmacist if you are unsure, and keep the bottle away.

## About
- [About Date Check Notes](https://supplement-shelf-life-check.pages.dev/about/): not medical advice, how the site is funded and how guides are made

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