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.
Maturation, also known as remodeling, is the last stage of the wound healing process. It occurs after the wound has closed up and can take as long as two years. During this phase, the dermal tissues are overhauled to enhance their tensile strength and non-functional fibroblasts are replaced by functional ones.