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Percentage changes of skin parameters in the test group between baseline and the end of the twelve week interventional period (T0–T12, solid blue bars) and between baseline and the end of the four week follow-up period (T0–T16, open white bars) for skin hydration (A), skin elasticity (B), skin roughness (C), and skin density (D) in the test group. The error bars indicate standard errors of the mean. Changes are significant at p < 0.0001.
