For twins under the age of 40, a body mass index (BMI) difference of four points made the thinner twin look, on average, up to three years younger. Over 40, however, the same disparity in weight made the heavier twin look up to three years younger. And over 55, that effect was even more pronounced.
If you wish your complexion looked a little fresher, or your skin felt a bit firmer, you have more options than ever - from makeup and creams to needles and lasers to scalpals and sutures. How far should you go? Your face, your call.