Dr. Leaf tries to pick only the physical sunscreens (instead of a chemical based sunscreen) as she feels that is better for our skin.  Chemicals can irritate our skin and cause more problems.  there are times when a chemical sunscreen is the better option, but for most of us, a physical/mineral sunscreen is exactly what we need to protect our skin from UV light and other causes of skin aging.  Dr. Leaf carries different options, depending on your skin type (dry vs sensitive) and whether you want to use a simple sunscreen or a sunscreen that does the job of 2 or 3 other products, making it quicker to apply your home skin care.