Creatine does come with an expiry date on its tub, yet it doesn't truly 'expire.' Instead, its effectiveness might diminish if not stored properly. To uphold its quality, it's vital to store creatine in a tightly sealed container, in a cool, dry area, and away from both moisture and heat. While creatine remains stable indefinitely, improper storage—exposure to moisture or heat—can compromise its efficacy. For optimal maintenance, ensure storage in a tightly sealed tub in a cool, dry place below 25°C.