Citrus Unshiu Peel Extract

This ingredient comes from the peel of the satsuma mandarin fruit native to Japan.

Unlike other citrus ingredients, this one is not known to cause photosensitivity. This is because the citrus ingredients that cause sensitivity are high in furanocoumarins. When exposed to UV, furocoumarins bind to and destabilize your DNA, speeding up the rate of sunburn.

Citrus Unshiu Peel Extract is unique in that the peel contains very low levels of furanocoumarins and tested products with this ingredient confirmed no detectable furanocoumarins.

The peel is rich in antioxidants and lab studies show it can help brighten skin by inhibiting tyrosinase, the enzyme responsible for melanin production.

One study on the fermented version of this ingredient found it could help reduce UVA-induced collagen breakdown. Though it is worth noting that while results are promising, robust human clinical trials are still needed.

This ingredient naturally contains limonene and other aromatic compounds that make it a perfuming ingredient.

The official COSING database only lists this ingredient as having "Perfuming" properties at this time. The brightening, antioxidant, and skin conditioning benefits that brands market come from the research literature and from how formulators choose to use the ingredient.