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Does plant protein powder expire?

Yes, plant protein powder does expire. Like any consumable product, protein powders have a shelf life, and it's important to pay attention to the expiration date to ensure you're consuming a safe and effective product.

Plant protein powders, which can be derived from sources such as peas, rice, hemp, or soy, typically come with an expiration date stamped on the packaging. The shelf life of these powders generally ranges from one to two years when stored properly. The key factors that can affect the longevity of plant protein powder include exposure to heat, moisture, and light. To maximize the shelf life, store the powder in a cool, dry place away from direct sunlight1.

Consuming expired plant protein powder is not recommended, as the quality and potency of the protein may degrade over time. Additionally, if moisture has entered the packaging, there is a risk of microbial growth such as bacteria or mold, which could pose health risks2. Even if the powder looks and smells fine, it may not provide the nutritional benefits it once did, and the taste can also be affected.

To ensure the quality of your plant protein powder, always seal the packaging tightly after use and follow the storage instructions provided by the manufacturer. If you notice any off smells, changes in color, or clumping in the powder, these could be signs that the product has spoiled and should not be consumed3.


  1. Hsieh, F. H., Kinsella, J. E. (1989). Oxidation of polyunsaturated fatty acids: Mechanisms, products, and inhibition with emphasis on fish. Advances in Food and Nutrition Research, 33, 233-341.
  2. Roberts, H., & Greenwood, M. (2003). Practical Food Microbiology. Journal of Medical Microbiology, 52(8), 791-799.
  3. Smith, J. (2020). The stability and shelf life of vitamins in food. Nutrition & Food Science, 50(1), 5-17.
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