You Bought the Protein Powder. Now What?

How to work out how much protein you need, where your diet falls short, and when a supplement actually makes sense as you get older.

You’ve decided a protein supplement might be useful. You’ve done battle with the wall of tubs in the nutrition shop, resisted the one promising some sort of “maximum anabolic matrix”, and finally made it home with something that looks as though it belongs in Arnold Schwarzenegger’s gym locker.

Now what?

How much are you actually supposed to take? Should y…