Raw meat diet is best for this but raw chicken is unsafe so is raw pork but I don’t eat pork look into Reddit r/rawprimal eat raw organs of beef or lamb/sheep including the brain, eat lots of fruits and vegetables, drink lots of water, exercise if you have the energy to, eat healthy animal products full of fat like cheeses butter eggs yogurt milk etc, and other healthy fats like olive oil, the Mediterranean diet is extremely good for health and life longevity so is Japanese like raw fish and sushi so look into that, also eat healthy whole grain carbohydrates your body needs it for the recovery process best of luck to those suffering