p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px 'Helvetica Neue'} span.s1 {text-decoration: underline} Clinical studies show a visible improvement from as early as 4 weeks of daily marine collagen powder use, with optimal effects after 2 to 3 months. This corresponds to the natural collagen renewal cycle in the dermis, which is approximately 60 days. For lasting results, regular courses throughout the year are recommended. p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px 'Helvetica Neue'}