The science that deals with the composition, structure, and properties of matter and with how matter changes under different conditions.
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Can cause premature aging and wrinkling of the skin. Nicotine in tobacco causes contration and weakening of the blood vessels and small capillaries that supply blood to the tissues, causing decreased circulation. Eventually the tissues are deprived of essential oxygen. Skins surface may appear yellowish or gray in color and can look dull.
Drinking cause over dilation and weakening of the fragile capillary walls and cause them to expand and burst. This causes a constant flushed appearance of the skin and red splotches in the whites of the eyes. It also dehydrates the skin by drawing essential water out of the tissues, making the skin appear dull and dry.
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Type UVA light creates unwanted metalloproteinase MMP’S that begin the cascade of cross linking collagen and elastin fibers?
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It causes oxidation and free radicals to enter the skin barrier.
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