02.13.13
• US Patent No. 8,337,820 B2; A topical skin care dihydroxyacetone-free gel formulation to protect skin from ultraviolet rays has been patented by Bart Nieuwenhuijsen of Penn Valley, PA. The formulation contains dispersed titanium dioxide, 5-hydroxy-tryptophan, histidine and N-acetyl-tyrosine.