Expiration & Storage Tips
When does spirulina expire?
Unopened, spirulina powder or tablets can last for up to 2 years stored in a cool, dry place. Once opened, it's best to consume within 6 months to maintain its nutritional efficacy, but it can still be safe to consume for up to a year if properly stored. Spirulina does not usually come in a frozen or homemade form.
How do you tell if spirulina is bad?
Spirulina can go bad, although rare, if it's not properly sealed or stored. The first sign that spirulina has gone bad is a change in color; it should always be a vibrant deep green. If it has turned brown or black, that's a sign that it should no longer be consumed. Another telltale sign is smell. Healthy spirulina has an earthy scent. If the scent has become overly pungent, or if it smells sour or fishy, the spirulina has probably gone bad and should be discarded.
Tips for storing spirulina to extend shelf life
• Always store spirulina in an airtight container.
• Keep it in a cool, dry, and dark place such as a pantry or cupboard away from sunlight to prevent it from oxidizing and losing its nutritional potency.
• Avoid storing spirulina near strong-smelling foods or spices, as it can absorb their aromas, altering its taste.
• Do not use wet utensils when scooping out the spirulina. Moisture can cause mold and bacteria to grow, shortening its lifespan.