Melasma and Tyrosine
I suffer from melasma on my face (due to thyroid issues etc) and have been trying to find a decent sunscreen for ages. I really liked the Sunumbra SPF 40 Sports edition, and am also looking at getting the SPF 30 Family edition simply because of the volume value. My concern is that the entire range seems to contain tyrosine, which is a precursor to melanin. I'm worried this is just making my melasma areas darker. It's difficult to tell because it's dermal melanoma.