Khubani Ka Meeta
“Students! Be careful about the food you eat. See that it is conducive to your health and happiness. The ancient sages used to eat only once a day. They declared that the man who eats only once is a Yogi (God-centred person), the one who eats twice a day is a Bhogi (enjoyer) and the one that eats thrice a day is a Rogi (a sick man). Today people go on consuming food at all times, not to mention drinks and snacks in between. With the result that indigestion sets in.
Young people should be satisfied with 2000 calories of food per day. This is enough to sustain them. Anything in excess will cause indigestion and sleeplessness. Loss of sleep gives rise to many ailments. Don’t worry about sleep. If you go to bed without any worry, you will get sound sleep. “