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Understand the different types of collagen: There are at least 28 forms of collagen, but the three most important in supplements are type I (skin, tendons, bones), type II (joint and cartilage health), and type III (skin elasticity, organs, veins)
doi: 10.1016/j.pt.2018.07.011 21 GoldschlagerN.EpsteinA
Sleeping well and managing stress
Ensure you rotate injection sites each week
RETRACTED April 2025
safer alternatives (oral/topical glutathione, dermatologic/lightening creams or treatments) are preferable
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