Protein powders are expected to be a $7.5 billion industry by 2020, and the products are popular for a wide variety of reasons: Vegetarians might feel that their diets are somewhat lacking, athletes may want to add muscle faster or aim for a competitive edge, and still others might be looking for a quick meal that isn't dripping with grease.


원문출처 : http://www.cnn.com/2017/12/06/health/protein-powder-pros-cons/index.html