Do not take such multivitamin tablets without doctor's advice. This can lead to a variety of problems as a result of your body's side effects. So refrain from taking such drugs. If you want to gain weight naturally then there is only one way to gain weight naturally - diet. If you regularly eat fish , meat , milk , eggs , vegetables , fruits then you will definitely gain weight. You can gain weight only by eating nutritious food . Eat regularly. Take nutritious and balanced food three times. So that the body gets the necessary energy. You can eat fatty foods as food. These are helpful for rapid weight gain. Can eat oily and marine fish as fish. These provide essential nutrients to the body and cause body damage. Meat can be eaten as your choice. The type of meat that you like is type 6 You can eat only meat. Also eat juicy and sweet fruits as fruits. Juicy and sweet fruits help to increase body weight. Make it a habit to eat fruit every day of the week. Drink 1 glass of milk and a teaspoon of honey before going to bed at night. Drink at least two glasses of water on an empty stomach in the morning between 9-30 in the morning . Increase the amount of food to eat 4-5 times. Sleep at least 7-8 hours a night. If possible, sleep for 1 hour after lunch. Practice in this way. If necessary, consult a medical specialist.