yea to stay slim and "in shape", especially when they start aging metabolism slows down and they do all sorts of crazy shit, I once visited a private many years ago, all she had on her dining table were countless bottles of supplements and canned tuna, she was definitely under weight and she had a foul breath, she told me she's on low carb and all she ate tuna + salad, rinse and repeat...typical "carb phobia", also some WLs work crazy hours which can lead to bad eating habits...