Does Casein Protein Powder expire?

Yes, casein protein powder does expire as the protein efficiency deteriorates over time. Once the expiry date is exceeded a fresh product should be used. A product may still be able to be consumed after the expiry date, but we do not recommend it. For best results casein protein powder should be stored in a cool dark location in an air-tight container. Don’t store protein powder in the fridge or freezer as condensation can form on the inside of the container and quickly spoil your powder.