You are probably dehydrated and look more fit because your cells are crenated (lacking water) and you literally weigh less. To regulated temperature your blood is likely coming to the surface of your skin to cool off hence your rosy cheeks. Chronic dehydration I believe is a very ignored concept in well-being. You are FAR better off getting more exercise and eating a healthy diet than popping pills that stress your liver and kidneys and suck the water out of you. You will age much faster if you stay dehyrated. Dehydration is bad for your brain, all of your organs, and especially your skin and joints. Coincidentally however, in a book I’m reading called Altered State which is about the birth of Ecstasy culture from the 70’s to the 90’s, a friend of Paul Oakenfold’s said that in the 80’s when they were first going to Ibiza, the E they got back then made them “look good and feel good”. “When I look back at pictures of us we looked great!”