Polypodium leucotomos can help block the effects of visible light, which is beneficial for conditions like melasma.

“the other thing that it helps prevent — that some sunscreens cannot particularly the chemical sunscreens cannot is the effects of visible light so there are certain skin conditions the most common is melasma which a lot of women have you know it's I think the bane of their existence and melasma is something that is very sensitive to both UV and visible light chemical sunscreens don't do a good job blocking visible light polypodium has been shown to help block the effects of visible light as well”