If the purpose is to gain muscle, then you can eat whey protein powder. Whey protein powder is generally 100 yuan per kilogram.

If a bodybuilder exercises muscles just for fitness, muscle gain and keeping in good shape, there is no need to eat protein powder, because the daily diet is enough to provide enough protein for muscles. And too much protein can't be stored, and too much protein will be excreted with sweat and urine. And taking too much protein will increase the burden on human kidneys.