Most people take it before or/ and after work outs since protein helps repair your muscles. It depends how much you work out for the amount of protein.Recommended Dietary Allowance for Protein. Grams of protein needed each day

Children ages 1 – 3 13

Children ages 4 – 8 19

Children ages 9 – 13 34

Girls ages 14 – 18 46

Boys ages 14 – 18 52

Women ages 19 – 70+ 46

Men ages 19 – 70+ 56

Basically you need to aim for 1g of protein for every 1 pound of body fat, so in your case 120g per day.

However, you're probably already getting quite a bit of protein already through your diet (any chicken, eggs, fish counts!) so work out how much protein you're getting already, then supplement the rest with the powder to get to 120g.

I'd say 40-50g.Just don't take to much protein generaly it may cause you problems and it's just pointless to drink too much protein.

Drink it post workout or after.