eating only one meal a day is not enough for several reasons. it's highly likely that you're not going to get the nutrients you need to stay strong and healthy. you need protein to keep your muscles strong. you need fruits and vegetables to get important vitamins minerals and antioxidants. and you need a steady stream of carbohydrates to keep your energy up. by eating only one solid meal a day your metabolism is going to take a nosedive. when you go many hours without eating your body goes into starvation mode which contributes to the loss of muscle mass. we already tend to lose muscle as we get older. so not eating at least three solid meals a day could make that happen faster. if you find that you're not hungry throughout the day take a walk. physical activity can often help stimulate the appetite. you want to make sure you're giving your muscles the fuel they need and consuming the right amount of nutrients to stay healthy.
now that i'm in my 60s is it ok to eat just one healthy meal a day?