Shelf Stable Foods
How long does protein powder, whey, plant, or casein last?
whey, plant, or casein
Pantry
365–730 days unopened
After opening: 180–365 days
Storage tips from USDA
Loses potency past the printed date but generally safe if stored dry. Discard if it smells off or clumps from moisture.
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Storage estimates for this item are from Typical manufacturer best-before guidance for this product category. ok2eat collates shelf-life data from multiple public, trusted sources and normalizes to days for comparability. See our directory home for the full source list.