The present invention discloses certain heterocyclic complexes of metals of formula (I), especially those of manganese, which enhance the safety and efficacy of sunscreens via urocanate pathway modulation. The present invention also discloses a method for topical application of said complexes, which causes the reduction of topical peroxide including hydrogen peroxide, the reduction of topical inflammation including sunburn, increased sun protection of skin, comprehensive protection from UVA, UVB, and UVC, reduction of radiation-initiated inflammation, the reduction of skin wrinkles, acne, and overall treatment of skin damaged from natural aging and exposure to sun: