Collagen type II might work by causing the body to produce chemicals that fight pain and swelling. But this is unproven. Most collagen type II found in supplements comes from chicken. Some collagen type II in supplements comes from cows.
Collagen type II is used for osteoarthritis. It is also used for other types of joint and muscle pain, but there is no good scientific evidence to support these other uses.
Don't confuse collagen type II (native) with collagen peptides, collagen type I (native), or gelatin.
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