Vitamins & supplements · Storage guide
How long does protein powder last? Fridge, freezer & pantry
Storage temperatures: keep the fridge at ≤4 °C (40 °F), the freezer at −18 °C (0 °F), and the pantry cool and dry at room temperature.
| Fridge ≤4 °C · 40 °F | Not recommended |
|---|---|
| Freezer −18 °C · 0 °F | Not recommended |
| Pantry room temp | 1 year |
| After opening | about 3 months |
Times are for unopened, properly stored protein powder and reflect best quality. Always use your senses and follow any date on the package.
Signs protein powder has gone bad
- Off or rancid smell (especially fish-oil and seed-based supplements).
- Discolouration, crumbling, or a changed texture.
- Moisture or clumping inside the bottle.
When in doubt, throw it out — the cost of a spoiled meal isn't worth the risk.
Best way to store protein powder
Keep supplements in their original sealed bottle in a cool, dry place away from light and humidity — the bathroom cabinet is usually too humid. Some (probiotics, fish oil) keep best refrigerated; check the label.
Frequently asked questions
How long does protein powder last in the freezer?
Freezing protein powder is not recommended — it loses too much texture or quality. Store it in a cool, dry pantry instead, as shown in the table above.
How long does protein powder last in the fridge or refrigerator?
Protein powder is usually stored at room temperature rather than the fridge — about 1 year in the pantry. Check the table above for the full breakdown.
How can I tell if protein powder has gone bad?
Off or rancid smell (especially fish-oil and seed-based supplements). Discolouration, crumbling, or a changed texture. Moisture or clumping inside the bottle. When in doubt, throw it out.
Sources
Shelf-life figures and food-safety guidance are based on these authoritative sources:
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