Waardenburg syndrome. Description. Waardenburg syndrome is a group of genetic conditions that can cause hearing loss and changes in coloring (pigmentation) of the hair, skin, and eyes. Although most people with Waardenburg syndrome have normal hearing, moderate to profound hearing loss can occur in one or both ears. The hearing loss is present from birth (congenital).
While both retinol and Retin-A contain retinoids, they differ in their concentration. Retinol and other forms, such as retinal and retinyl palmitate are found in many over-the-counter anti-aging creams. While these all contain a form of vitamin A, the concentration of retinoids is weak. Retin-A is a prescription retinoid and is a brand name for tretinoin, which is the carboxylic acid form of vitamin A and was one of the early topical acne treatments. Retin-A is sold by prescription because its acid composition is much greater than in over-the-counter products.
Retinol is the animal form of vitamin A. It is fat-soluble and helps keep vision sharp and bones strong. Other forms of vitamin A include retinal, retinoic acid and retinyl esters, but retinol is the most usable.All version of vitamin A together are known as retinoids.alk into any pharmacy or beauty department and you will find products with retinol. It is praised for its anti-aging abilities, and the positive benefits it has to offer your skin. Here is everything you need to know to understand retinol, its benefits and its uses.