Skin knowledge

Fine lines

Where skin creases, and what actually softens it

Fine lines settle where the face moves most: the outer eye, the forehead, the fold from nose to mouth. How visible they look on any given day depends on hydration, on the light you are standing in, and on years of sun. Firmness itself is a mechanical property — how skin resists and returns when it is pressed — and no photograph carries it. MIRU does not score your fine lines and does not estimate your collagen. What follows is what a clinician assesses in person, and which actives have evidence behind them.