Calories are needed to build muscle. Calories can include protein but more importantly, a person should eat a healthy diet.
Eating tuna helps to gain muscle because tuna is protein and protein builds muscle. However, to build muscle you need to exercise as well.
If you were anorexic, you probably lost a lot of muscle mass. It will take you a while to build back muscle and muscle is where you burn calories. Try building muscle mass. Eat plenty of calories and specifically 60 to 80 protein grams or more and exercise to build back muscle mass. You really need to get healthy again and you'll only do that by building muscle.
to build more muscle mass
to build more muscle mass
Protein supplies muscles with what they need to be able to build. But they will not build unless you work them out, you can't get muscles just from eating high protein food. But it does help.
Whey protein is a good source of protein, it has all the essential amino acid (the ones your body can't produce), amino acids its what repairs muscle tissue, in order to build muscle you need to do hypertrophy excercises and take 1~2 grams of protein per pound of lean body mass.Whey protein by itself will not build muscle, but is a good kind of protein like eggs or chicken, the difference is that Whey has a faster absorbtion.
Make sure that a large percentage of your calories are from protein, that way you will be better able to maintain muscle mass and your body will adapt to lower calories better and feel less fatigued. Don't restrict your calories. You need calories especially protein calories to sustain muscle. If you are building muscle and doing lots of exercise your calories in are still fewer than calories used so you will lose fat.
Having extra protein in your body merely provides a stockpile of fuel/food for potential muscle growth, but you need to work the muscles. Without the work, the extra protein gets you nothing.
For the average sized female approximately 60 grams of protein per day is needed to maintain muscle - over that - in combination with strength training will increase muscle mass. For the average sized male, approximately 80 grams of protein per day is needed to maintain muscle.
To build up muscle as fast as possible, you need to work out at least 6 days a week and do weight lifting. Also, there are things you can take to help you bulk up faster like whey protein. The protein will help you build muscle faster and make your muscles larger.
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Protein helps build many essential parts of a person's body; particularly muscle. If you feel that you are not muscular enough, you should exercise more and eat more protein.