Our body changes throughout our lives. We can both feed him and keep him in good shape.
The current state of the body depends on the way of life we lead (nutrition, physical activity ...). It is necessary to take into account what is recruited fat is 5-10 times faster (in days) than it goes away. That is, in order to return to your form after three days of eating sweet and starchy foods, you need to adhere to a healthy diet and exercise from two weeks to a month.
From my own experience, I can recommend an abundant intake of fresh water (up to 5-6 liters per day) and a return to a healthy diet, i.e. minimization or elimination of those foods that are considered harmful to the body. As for sports, then, of course, to continue training in conjunction with everything that I wrote about earlier.
They said they had been in a coma for 1.5 years, or had been drinking for 2 months almost continuously: D
Just take it and not eat it. Or smoothly nullify what is eaten. There are products from this category in the morning, hours until 12-14. But, as my 35-kilogram friend says: "If you want to eat, have some water."