Collagen
Why?: If you want a protein powder that may have potential benefits for your joints and skin complexion.
Adding connective tissues from cows and fish into your smoothie might not sound appetizing. Still, collagen is one of the most popular protein powders out there, as it can help protect your joints, build muscles, and support your skin health. Some believe that collagen digested will work more quickly than the collagen mixed within skin creams, and perhaps that explains the recent popularity of collagen powders, pills, and potions.