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Topical cosmetic only. Growth-factor serums/creams are applied to clean skin once or twice daily per the product. Formulations and growth-factor sources vary widely and are unstandardized, and penetration of large proteins through intact skin is uncertain. There is no oral or systemic dose. This library does not provide an ingestion protocol.
Any time
Leave-on growth-factor/EGF serum (unstandardized; weak evidence)
Throughout
12-24 weeks
Throughout
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