In theory, sunscreen with super-high SPF should give you the best protection against damaging UV radiation. 

But in practice, it doesn't really work that way.

At best, high-SPF sunscreens give you only slightly better protection than a sunscreen with SPF15, according to the annual sunscreen report just published by the Environmental Working Group (EWG).

There are two kinds of UV radiation that hit your skin when you're in the sun: UVA and UVBUVB is the kind responsible for sunburns, while UVA is the kind that reaches deeper into the skin and causes skin aging. Both of them may increase your risk of skin cancer with extended sun exposure. 

SPF (short for "sun protection factor") is a measure of how well a sunscreen protects you from UVB. It seems like an SPF 100 sunscreen would give you double the protection of an SPF 50 sunscreen. But the truth is that higher-SPF products are only marginally better at shielding you from UVB, according to both the EWG and the Skin Cancer Foundation.

While sunscreens with higher SPF block slightly more UV rays, they last the same amount of time and all sunscreen should be reapplied after two hours.

That is the reason Starflower Essentials chooses to use an SPF 15 -22 in their sunscreen products. Our natural sunscreen is the best quality and exactly what your skin needs and it is all natural too.