Yes, toothpaste can expire. While using expired toothpaste won't harm you, its effectiveness diminishes significantly over time.
Why Toothpaste Expires
The primary reason toothpaste expires is the degradation of fluoride. Fluoride is the key ingredient fighting cavities and protecting tooth enamel. Studies show that fluoride degrades considerably after two years, reducing its cavity-fighting capabilities. [Source: Multiple sources including Colgate, Crest, and various dental blogs.]
Shelf Life and Expiration Dates
Toothpaste typically has a shelf life of approximately two years from the manufacturing date. This two-year mark ensures the fluoride remains at its optimal level of effectiveness. [Source: Colgate, Dragonfly Dental Port Charlotte, and other sources.] Check the tube for the expiration date for the most accurate information.
Using Expired Toothpaste: Effectiveness vs. Safety
Using expired toothpaste is generally safe, but it's less effective at preventing cavities. The reduced fluoride concentration means it won't protect your teeth as well as fresh toothpaste. [Source: Crest, Espire Dental, and numerous online sources.]
What Happens to Expired Toothpaste?
While not harmful, the texture and taste of expired toothpaste may change. The fluoride degradation is the main concern, affecting its primary function. [Source: Multiple sources corroborating the effects of degraded fluoride.]
