Is your diet protein deficient? I would assume that protein drinks would not help anymore than adding protein to your diet in other ways, and protein drinks tend to either have a lot of sugar, or artificial sweeteners, along with the protein. It's very rare for someone in the US to be protein deficient, unless they are on a very restrictive diet.
If you think you might actually be deficient in protein, it might help to talk to a nutritionist or dietician to help you develop a healthy eating plan instead of adding supplements -- they tend to be more expensive that regular food.
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