Collagen Complex
Collagen supplements are made by extracting the collagen from connective tissues of animals such as cows, fish, and chickens. These supplements can be taken in powder and capsule form as well as added to foods such as protein bars. Since collagen makes up 80% of our skin, collagen supplements have been regarded as a tool to improve and maintain skin health as well as joint, gastrointestinal, and bone health.
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http://supplementsnetwork.org/