Use of an aqueous solution of bacteriorhodopsin of the strain of the halophilic bacteria Halobacterium salinarum VKPM V-11850 containing bacteriorhodopsin at a concentration of 2.4 mg/ml (0.24%) ― 7.5mg/ml (0.75%) as an active component of a cosmetic skin care product, wherein the bacteriorhodopsin is obtained as follows: - growing for 6 days the strain of halophilic bacteria Halobacterium salinarum VKPM V-11850 in 750 ml flasks in a volume of a growing medium of 300 ml under fluorescent lighting until the stationary growth stage on a circular shaker at 37°C and shaking 100 rpm, wherein for cultivation, the medium of the following composition is used (mass%): peptone - 1, yeast extract - 0.5, NaCl - 25, MgSO 4 - 2, KCl - 0.2, sodium citrate - 0.3, glycerin - 0.1, CaCl2 - 0.02, water - the rest, pH of the environment - 7.2-7.4; - after 6 days, separating the precipitate by centrifugation at 7000 g for 10 minutes and weighing the obtained biomass; - adding distilled water in a volume of 300 ml to 20 g of the separated precipitate and incubating the separated precipitate in the distilled water with stirring at room temperature for 16 hours; - after centrifugation at 7000 g for 10 min and 4°C, discarding the precipitate; - centrifuging at 50,000 g the resultant supernatant for 40 min and 4°C; - discarding the supernatant; - pouring distilled water in the same volume into the obtained precipitate; - suspending the precipitate and centrifuging the resulting bacterial lysate suspension at 50,000 g for 40 minutes and 4°C and repeating the manipulation of suspending the precipitate in water followed by high-speed centrifugation until the ratio of the optical density of the solution at a wavelength 280 nm to the optical density of the solution at a wavelength of 570 nm (D280\D570) is less than 2.5 in the suspended precipitate after the next centrifugation; and - diluting the supernatant with distilled water to a concentration of bacteriorhodopsin of 2.4 mg/ml (0.24%) - 7.5mg/ml (0.75%). - growing for 6 days the strain of halophilic bacteria Halobacterium salinarum VKPM V-11850 in 750 ml flasks in a volume of a growing medium of 300 ml under fluorescent lighting until the stationary growth stage on a circular shaker at 37°C and shaking 100 rpm, wherein for cultivation, the medium of the following composition is used (mass%): peptone - 1, yeast extract - 0.5, NaCl - 25, MgSO 4 - 2, KCl - 0.2, sodium citrate - 0.3, glycerin - 0.1, CaCl2 - 0.02, water - the rest, pH of the environment - 7.2-7.4; - after 6 days, separating the precipitate by centrifugation at 7000 g for 10 minutes and weighing the obtained biomass; - adding distilled water in a volume of 300 ml to 20 g of the separated precipitate and incubating the separated precipitate in the distilled water with stirring at room temperature for 16 hours; - after centrifugation at 7000 g for 10 min and 4°C, discarding the precipitate; - centrifuging at 50,000 g the resultant supernatant for 40 min and 4°C; - discarding the supernatant; - pouring distilled water in the same volume into the obtained precipitate; - suspending the precipitate and centrifuging the resulting bacterial lysate suspension at 50,000 g for 40 minutes and 4°C and repeating the manipulation of suspending the precipitate in water followed by high-speed centrifugation until the ratio of the optical density of the solution at a wavelength 280 nm to the optical density of the solution at a wavelength of 570 nm (D280\D570) is less than 2.5 in the suspended precipitate after the next centrifugation; and - diluting the supernatant with distilled water to a concentration of bacteriorhodopsin of 2.4 mg/ml (0.24%) - 7.5mg/ml (0.75%). <EOS>