The main aim of dietary modification for underweight person is to restore the body weight to normal. The dietary modification for underweight aims to bring body weight to normal; it is also to provide some extra energy store for the possible lean period. By bringing the body weight to normal it is possible to avoid complications that may arise due to low body weight.
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The following modifications should be done in diet to help bring the body weight to normal in an underweight person:
Energy:
The most important dietary modification required is to provide extra approximately 500 Kcal per day. This 500 Kcal per day is above the daily requirement of energy or calorie. Extra 500 Kcal per day will increase body weight by approximately 0.5 kg (kilogram) per week. If higher weight gains (more than 0.5 kg per week) is desired than daily extra calorie intake should be about 1000 kcal per day which will cause weight gain of approximately 1 kg per week.