Generally, plant-based protein powders do not require refrigeration unless the packaging specifically instructs you to do so after opening. Store them in a cool, dry place away from direct sunlight.
Most plant-based protein powders are shelf-stable due to their low moisture content. Refrigeration is typically only necessary if the product contains added ingredients that are more susceptible to spoilage, such as probiotics or certain oils. Always check the manufacturer's instructions on the packaging. If the label doesn't explicitly say to refrigerate after opening, a cool, dry pantry or cupboard is usually sufficient. Factors that contribute to spoilage include moisture, heat, and light. Keeping the protein powder in its original, sealed container or an airtight container will also help maintain its quality and prevent clumping. If you notice any changes in smell, taste, or texture, it's best to discard the product.
To prevent clumping and maintain freshness, avoid using a wet scoop to measure your protein powder. Always use a dry scoop and ensure the container is tightly sealed after each use.