Define Carbohydrate requirement to avoid underweight problem?

Liberal amounts of easy to digest carbohydrates should be included in the diet. The intake of dietary fibre should be minimized so as to prepare meals which are nutrient dense and have a small volume. Include more of high calorie vegetable like potatoes, colocasia and yam instead of reddish, cucumber, leafy vegetables which are low in the carbohydrate content. All cereals provide high calories at low cost and should provide about 55-65% of total kilocalories.