The present invention relates to a sunscreen formulation comprising at least one of the UV filters (A) selected from (a) triazine derivatives (b) cinnamic acid derivatives (c) bis resorcinyl triazines (f) benzimidazole derivatives (i) 4 Methylbenzylidene Camphor (h) benzoyl piperazine derivatives (j) benzoxazole derivatives (k) diarylbutadiene derivatives (I) phenyl benzotriazole derivatives (n) benzylidene malonates (o) TEA Salicylate (r) imidazoline derivatives (u) inorganic UV filters selected from metal oxides (v) naphthalates and (w) merocyanine derivatives and optionally comprising at least one of the UV filters (B) selected from (d) aminobenzophenone derivatives (e) dibenzoylmethane derivatives (g) Diphenylacrylate derivatives (i) camphor derivatives different from (o) salicylate derivatives different from (p) anthranilate derivatives and (s) benzalmalonate derivatives wherein the ratio R of the effective irradiance for previtamin D formation E to the effective irradiance for erythema formation Eon the skin is at least 1.8 for increasing the transmittance of UV radiation on human skin for the production of cholecalciferol (previtamin D) and simultaneously for the use in a method for protecting the human skin against UV radiation when exposed to the sun which method comprises applying said sunscreen formulation to the skin.
