Lactic Acid – an alpha-hydroxy acid effective at exfoliating/shedding dead epidermal skin cells. AmLactin Cream, Avene Akerat line.

Lavender Oil – anti-inflammatory, anti-septic, anti-bacterial, energizing, soothing, healing. Skinceuticals. Letinus Edodes ( Shitake mushroom) – source of vitamin A, B, C, D, diminishes surface microbial counts.
In Epionce line, Jack Black.

Licorice Root Extract (glycyrrhiza glabra) – Inhibits tyrosinase activity, brightens and lightens dark skin spots. In Lumiquin by Revision. SilkPeel. iS Clinical.

Lutein – protect against sun induced free radicals and hydrate