Should I take casein protein while dieting?

I usually eat dinner at around 18.00 and have an apple or something at 20.00 and thats my last thing i eat before bed. But i''m thinkin instead of the apple i should take casen protein because i''m always so hungry at night. So should i take it or will it ruin my whole diet?

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Recommended Answer:
depends how much you''re exercising and if you want to build muscle.
protein powder has a lot of calories, which is fine if you''re working out.
but if you continuously drink it withouth exercise it can cause you put on weight.