Lentinus Edodes Mycelium Extract
The fermentation broth of the nice, edible mushroom known as Shiitake. Apart from the gourmet food industry, it is also used in several industrial applications as it contains biocatalytic enzymes (such as laccase, cellulase, and ligninolytic peroxidases) useful for breaking down things both in the paper and textile industries.
The latter one, the textile industry, uses Shiitake ferment to break down dyes in waste streams in an environmentally friendly way and this gave the skincare industry an idea: if Shiitake ferment can break down synthetic pigments, it might be able to do that to natural pigment, i.e: melanin.
Based on the in-vitro (in a test-tube) and in-vivo tests by the manufacturer, the idea seems to work. On a panel of ten volunteers, 2% Shiitake Ferment was compared to nothing, to 0.05% Glabridin (the powerful active ingredient in licorice root) and to 2% Kojic acid. The Shiitake formula came out on top. It lightened UVB-treated skin by 50% after 28 days (just for comparison, untreated skin lightened by 30%).
Overall, Shitakee ferment is an interesting new approach to skin-brightening, so if you suffer from extra pigmentation, it might be something to experiment with.