Generally speaking, the vertical axis of a tropical cyclone, usually defined by the location of minimum wind or minimum pressure. The cyclone center position can vary with altitude. In advisory products, refers to the center position at the surface.
Facts on vitamin A and psoriasis. 1  Vitamin A can be very effective in treating psoriasis. 2  Creams and tablets can be prescribed. 3  High doses of Vitamin A should only be given under specialist supervision.  A combination of Vitamin A and phototherapy (light treatment) can give excellent results of most patients.
Vitamin D3 is another of the best vitamins for hair skin and nails. It acts to regulate the production of keratin, the main component in hair, skin and nails. These effects have led to the use of vitamin D on treatment of psoriasis.