(1) Clinical study on 30 subjects aged from 14 to 30 years old with mild to moderate acne with very dry skin under topical or oral treatment (retinoic acid or isotretinoin) after 28 days of twice daily application in addition to their usual daily cream, Portugal, 2023.
(2) Measurement of skin pH by skin pH meter on 10 subjects after 28 days of use.
(3) Measurement of hydration level by corneometry on 12 subjects 24h after the last application