What are the advantages of taking protein supplements after weight training?

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by Paleo-Crossfit-Omnivore-Lowcarb-NonVegan-Meat-Diet
Question by Paratrooper: What are the advantages of taking protein supplements after weight training?
I do a fair amount of weight training as an all round fitness regime. However, I have noticed a lot of folk take protein drinks after a training session. I would like to know the advantages, disadvantages and the long term effect of such supplements.


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