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Description
Besides being the main structural protein in ligaments, tendons, bones, skin, blood vessels, and cartilage, all-natural collagen supplementation also has anti-aging properties

10.1186/1471-2164-12-524 49 LeBoeufR

The cycle becomes less effective per dose

FEMS Immunol

Storage and formulation quality can dramatically reduce effective half-life before the experiment even begins
These changes in expression may be due to decreased glutathione and increased oxidative stress