Collagen Supplements: Hype or Helpful for Skin, Joints, and Bone?
Collagen is well studied for skin, mixed for joints, and emerging for bone. Here is what the research really shows - the difference between peptides, gelatin, and undenatured type II, how much to take and for how long, the vitamin C cofactor, marine vs. bovine vs. 'vegan collagen,' and how to choose one.