Our skin is the largest organ in our body and is our barrier to the outside world. Skin has the ability to absorb and release a huge number of chemicals, and because of this sweating is my favorite way to detox!
Back to the sun and skin story, a sunburn causes oxidative damage to your skin, and so does a sunscreen with toxic chemicals. Put the two on top of each other and you've got a bad combination. Oxidative damage over time can lead to premature aging of the skin, sun spots, pre-cancerous lesions, and skin cancer.
My favorite way to protect myself in the sun is to cover up with a good hat and light weight long layers, along with my favorite sunscreen Badger brand SPF 30!