Many sunscreens only provide UVB protection because these rays cause burns. But your sunscreen should also help to prevent bad UVA rays. These do not burn the skin. They go right through it (and the BTW glass) where they operate stealthily and damaging, deep into your dermis. This is where your new cells are formed along with elastin and collagen. As a result, Sunspots, wrinkles, lack of firmness, etc. – at an unspecified time. Ingredients like zinc oxide and titanium dioxide help protect against UVA and UVB rays. Avobenzone and Mexoryl also provide UVA protection according to some skincare experts.