How does gaining weight affect aging?

Strong evidence shows that weight gain between the ages of eighteen (for women) or twenty-one (for men) and forty is particularly dangerous. Weight gain in your early to mid-adult years can make your RealAge (physiologic age) one half to one year older for every 10 percent gain in body mass index. Furthermore, every 10 percent increase in relative weight is associated with a 6.5-millimeter rise in systolic blood pressure, and high blood pressure is one of the major factors affecting aging.

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