The Best Protein Powders for Women, According to Nutritionists

"The only ingredient used here is peanuts," says Linzy Ziegelbaum, M.S., R.D., C.D.N. "With 11 grams of protein, 4 grams of fiber, only 100 calories, and 3 grams of fat, this peanut butter protein powder is a great low-calorie option to add to breakfast or snacks. I would try adding it to smoothies, yogurt, oatmeal, and baked goods for the peanut butter taste with half the calories and fat." ($35 for 2 lbs; norcal-organic.com)

Protein: 11 grams per 2-scoop serving