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After hitting the gym, your muscles may need a little extra help with recovery. Consuming protein powder directly after a work out helps repair tissue to build muscle and enhance strength and endurance, says Erin Palinski-Wade, R.D., author of Belly Fat Diet for Dummies. There are a ton of options when it comes to protein powder, so we asked six nutritionists to share the ones they think women should have stocked in their pantries.