This abstract is of paper no. Al02-2016 will be published fully soon.
Abstract
By exposing skin to environmental conditions in addition to some endogenous factors, a change in the skin structure occurs. Physiological and structural changes in the skin layers occur especially in the areas more exposed to the sunlight and radiation. These changes are known as the aging process. Two common aging processes are differentiated. Intrinsic aging process occurs due to time passing. Extrinsic aging process occurs due to environmental and life style reasons. These reasons include: repeated facial expression, smoking, alcohol consumption, poor diet and photo-aging by exposure to sunlight. During the last two decades, anti-aging products have become so popular between people. Number of anti-aging ingredients have been developed and synthesized and a lot of products have been formulated and marketed either to slow down the aging process or to remove the wrinkles, pigmentation and other aging signs. Anti-aging functional ingredients are classified into groups. Each one of these groups has its own function, uses and characteristics. Some of them are found in nature and others are chemically synthesized in labs.
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