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.
Other OTC Treatments. There are other products which don't contain salicylic acid or coal tar that are beneficial for treating psoriasis. Ingredients such as aloe vera, jojoba, zinc pyrithione, capsaicin and others, are frequently used to moisturize, soothe, remove scale or relieve itching.