There are plenty of better options for sun protection today, but it is considered "safe as used" (and sunscreens are pretty well regulated) and it is available worldwide (can be used up to 10% in the EU and up to 7.5% in the US)
Kurutas Nutr J 15:122 Laua A, Villeneuvea NF, Suna Z, Wong b PK, Zhang DD (2008) Dual roles of Nrf2 in cancer
Pldoras blanqueadoras de glutatin, 180 cpsulas de 2000 mg de glutatin, suplemento eficaz para aclarar la piel, eliminar manchas oscuras, melasma y cicatrices de acn, tratamiento de hiperpigmentacin, antioxidante antienvejecimiento Size: 180 Count (Pack of 1) En stock 0.19 kg S Nuevo Amazon USA Blanqueamiento eficaz de la piel: estas pldoras se han creado especialmente para un brillo eficaz de la piel
Also, NACA was shown to inhibit dexamethasone-induced cataract formation by limiting lipid peroxidation and increasing the ratio of GSH/GSSG in rat lens