What is the shelf life of Green Screen® Sunscreen?
FDA requires sunscreen manufacturers to provide a 2 year shelf life on sunscreen products. This is because petrochemical sunscreen active ingredients degrade with time, heat and sunlight exposure. Zinc oxide however is a mineral, and as a result it never loses its sunscreen activity because being a rock, it cannot degrade as do the carbon-based sunscreen chemicals. Kabana still must put an expiration date on our products to comply with FDA regulations despite the fact that our product’s active ingredient is immune to degradation concerns. While the Zinc Oxide never becomes ineffective, Green Screen®’s natural and organic formula can eventually go rancid. We have not observed this to occur since we fortify the formula with vegetable vitamin E, which is an excellent antioxidant, good both for your skin and for preventing rancidity. Zinc Oxide also acts as a preservative, since in addition to it being the best and safest sunscreen on the planet, it is also antimicrobial and antifungal. (A
