protein is very important part. if you want to gain muscle and strength. so eat at least minimum protein of you daily body need. if your diet has less protein then purchase protein powder to fulfill your need.
Remember:
[ Drink 3 to 4 liters of water every day.
Do Not drink it all at once; instead,
divide it into smaller portions throughout the day.
In total, you should consume 3 to 4 liters of water daily. ]