Although you cannot change the genes that determine how thick your skin is or how well the collagen and fibers hold up in the dermis, you can control other causes of skin thinning. For example, you can limit your amount of sun exposure. Overexposure to the sun's harmful ultraviolet rays breaks down and damages collagen in the dermal layer. When this happens, your skin is less likely to rebound from inevitable daily stretching and twisting. Avoiding or reducing your exposure to the sun's UV rays can reduce collagen loss [source: National Institute on Aging ].
Your skin tends to become thinner as you age. Therefore, it is important to take care of your skin in order to keep it supple and thickened. Thinning of the skin may occur when the level of collagen in the skin decreases and skin elasticity is lost. Collagen is a protein found in the skin which helps to nourish the skin and make it healthy. Thin skin may also be caused by the long-term use of steroid ointments that cause the skin to bruise easily and become fragile and transparent. Luckily, there are a number of things you can try to make your skin thicker, stronger and firmer.
A study that appeared in the October, 2005 issue of the journal Alcoholism: Clinical & Experimental Research found that "Alcohol consumption is inversely associated with both platelet activation and aggregation." Another study, published in 1986 in the same journal, found signs of subclinical vitamin K deficiency in a study of 20 male alcoholics. Perhaps not coincidentally, the signs of fetal alcohol syndrome closely resemble the symptoms of vitamin K deficiency in newborns.