One of the first things you should do if you are a senior or older person wanting to gain weight is to eat more often throughout the day. As a general rule, aim for five or six small meals spread throughout the day, with no more than three or four hours between them.
Increase the number of calories you consume from healthy meals in order to gain weight:
Increase your weight by drinking a high-calorie beverage. It is necessary to maintain a healthy weight at any stage of life in order to preserve excellent health and personal productivity, but it is more crucial for the elderly due to physiological changes that occur in the body as individuals grow older.