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.
Two prescription medicationsâVectical and Dovonex, which are applied to the skinâinclude vitamin D as their main active ingredient. Edee Scott, 72, of Corona, Calif., says vitamin D medication has helped calm her psoriasis, which is most severe on the palms of her hands and feet. She's had psoriasis since age 14, but it's only in the past 15 years that her psoriasis has taken on a life of its own, she says.
Acne, psoriasis, and other skin disorders. Prescription creams and pills containing retinoids, a synthetic form of vitamin A, are used to help clear up severe acne and psoriasis. They have also shown promise for treating other skin disorders, warts, and premature aging from the sun.