1 Clean your brush and use clean water or a second color to paint inside the outline, being sure to blend with the outer color. 2  Leave the middle white. 3  For a dark center, paint it in once the flower has dried.  For a light center, paint it while the flower is still wet to blend.
Why do people take vitamin A? Topical and oral retinoids are common prescription treatments for acne and other skin conditions, including wrinkles. Oral vitamin A is also used as a treatment for measles and dry eye in people with low levels of vitamin A. Vitamin A is also used for a specific type of leukemia. Vitamin A has been studied as a treatment for many other conditions, including cancers, cataracts, and HIV. However, the results are inconclusive. Most people get enough vitamin A from their diets.
Vitamin A is essential for a variety of biologic processes, many of which are related to growth, cellular differentiation and interactions of cells with each other or with the extracelluar matrix.any studies have now demonstrated that vitamin A (retinoic acid) is an important determinant of cell growth and differentiation. The classic studies of Wolbach and Howe (1925) established the necessity for vitamin A to maintain normal differentiation of tissues throughout the body.