how to put weight on?

According to mayoclinic.com: If you’re trying to gain weight, eat a well-balanced diet that includes:

Whole grains Vegetables and fruits Low-fat dairy products Lean protein sources, such as fish, poultry, beans and legumes You’ll likely need to add some fats and sugars to your diet for extra calories. When you add fats, choose unsaturated fats, such as nuts and oils. When adding sugars, select sweets that also provide nutrients, such as bran muffins, yogurt, fruit pies or juice, and granola bars. Eating three meals a day plus between-meal snacks on a regular basis will add the calories you need to gain weight, as well as the balance and variety you need in your diet. You don’t necessarily need protein drinks or shakes to gain weight. But these can provide extra calories if you feel like you’re eating all that you can. If you are at a healthy weight but still would like to gain weight, strength training can help increase lean muscle mass and add weight. Strength training is also good for your overall health. Develop a program of exercises that includes all the major muscle groups in your upper and lower body, and trunk. Proper technique is key. Select a weight that tires your muscle at about 15 to 20 repetitions when first starting. As you progress, try for one set of 12 repetitions about three times a week. Remember, changes in weight and body shape take time. If you want more individualized dietary advice on gaining weight, consult with a licensed or registered dietitian. Also, a certified trainer can help you get started with a strength training program.

Take care !!