Choose healthy food, eat more, five meals a day. For fitness, there has always been a saying that "practice three points and eat seven points". During muscle building, you should eat more foods rich in protein. Protein is indispensable for people who gain muscle or lose weight. Protein plays a decisive role in muscle building, but you must choose high-quality protein, such as eggs and milk, which is rich in high-quality protein for your intake. It is recommended to eat once per kilogram during muscle gain. I hope it helps you.