These sunscreens are formulated with advanced technologies and key ingredients to provide effective sun protection and additional skincare benefits. One of the key ingredients found in many Heliocare Advanced Sunscreens is Fernblock, an extract derived from a tropical fern known as Polypodium leucotomos. Fernblock has antioxidant properties and helps to neutralize free radicals generated by UV radiation, reducing the risk of skin damage and premature aging caused by sun exposure.