How Storage Affects Supplement Potency and Shelf Life

Proper storage is essential for maintaining supplement potency over time. Heat, moisture, light, and air exposure can all degrade active ingredients, sometimes significantly reducing the amount of nutrient you actually receive per serving. Probiotics are particularly sensitive to temperature and may lose viability if not refrigerated as directed. Fish oil and other omega-3 supplements can oxidize when exposed to light or heat, potentially producing harmful byproducts and an unpleasant fishy taste or odor.

To maximize supplement shelf life, store products in a cool, dry place away from direct sunlight — the bathroom medicine cabinet, despite its name, is often too warm and humid. Always check expiration dates before purchasing and using supplements, as potency declines over time even under ideal storage conditions. If a supplement has changed color, developed an unusual odor, or appears clumped or discolored, it may be degraded and should be discarded.