For Gaining Weight you can try some of these:

• The most effective and simple remedy to gain weight is to consume banana milk shake. It is a fast way to gain weight.
• Another effective way would be to have banana thrice a day. This should be followed with curd or milk.
• Muskmelon is beneficial in treating underweight problem. Have muskmelon three times a day as it helps in gaining weight.
• Another effective way to cure underweight problem would be to have fruit diet with milk. While fruits nourish the body with sugar, milk provides the proteins.
• An effective way to gain weight would be consume a glass of hot milk with a tablespoon of honey.
• Take a cup of milk and put some almonds, date palm and anjeer in it. Boil this milk and have it when warm. This is helpful in treating underweight problem.
• Mangoes are useful in gaining weight. Have a mango followed by a glass of milk. The other way would be to have a glass of mango milk shake every day for a month.
• Raisins are beneficial in solving underweight problems. Have 30 grams of raisins every day for about a month. This would surely cure underweight problems.
• Take 3-4 dry figs and immerse them in water. Keep them overnight. Have this twice a day to get cured of underweight problem.
• Combine equal amounts of pomegranate seed powder, white muesli powder and Indian ginseng root powder. Intake this mixture, twice a day for about a month, along with a glass of water or milk. Not only does it helps gain weight, but also tones up the body.
• Intake 100 to 150 grams of bran with fruits. The best deal would be to take it with papaya. It works as an excellent appetizer improving digestion and reducing constipation.
• Increase in the intake of fatty foods such as flour, rice honey, raisins, figs, dates, butter, germinated wheat, etc.