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.
Since Vitamin A also helps the skin rebuild tissues, it is also an essential vitamin when it comes to healing scrapes, wounds and other damages to the skin. Patients who suffer from the skin disease psoriasis are often advised to apply retinoids (a form of Vitamin A) to regulate cellular growth.