Supplements with too much Vitamin A can be toxic to the liver since Vitamin A is a fat soluble vitamin (meaning more gets stored than excreted.) Sweet potatoes and other foods rich in Vitamin A, however, do not cause liver toxicity and can not be stored for long-term use like supplements can.
The wound healing stages are made up of three basic phases: inflammation, proliferation and maturation. There are many types of wounds that require different wound care products for proper recovery from an ulcer or laceration, but most go through similar healing stages.
Sunburn is the skin damage brought about by ultraviolet rays. It normally leads to the skin to become red, warm and sometimes itchy for about one week. The skin that is found on the face will usually start to flake and then peel off after a few days and will fully heal within about a period of seven days.