Why it works
Exfoliation without scrubbing
The dead cells at the surface are not sitting there by accident: they are glued to one another by microscopic bridges. With the years these bridges release ever more slowly, the layer thickens, and the skin looks rougher and duller.
A chemical peel removes nothing mechanically. The acid works into the top layer and dissolves precisely those bridges. Without the glue, the dead cells shed on their own, gradually, over the following days.
What remains is a fresh layer that catches light differently. And a second, less visible but equally important effect: without the barrier of dead cells, whatever is applied afterwards penetrates considerably better.