Early sun exposure can lead to skin cancer later in life. (mamanista.com)
So the thinking is this: Even if too much sun leads to skin cancer, which is rarely deadly, too little sun may be worse. (slaw.ca)
I explain the reason that sunscreen may actually lead to skin cancer in this post, but one of the reasons is that a Vitamin A derivative, retinyl palmitate, that is often used in sunscreens was shown to speed up the growth of cancerous cells by 21 %. (wellnessmama.com)