Abstract: This disclosure relates generally to a sunscreen composition containing visibly transparent biocompatible ultraviolet blocking polymer nanoparticles. The sunscreen composition comprising polydimethylsiloxane (PDMS) nanoparticles, at least one flavoring agent, at least one coloring agent, at least one stabilizer, and at least one preservative, in a defined form, wherein size of the PDMS nanoparticles ranging from 200 to 1200 nm. The size of the PDMS nanoparticles ranging from 200 to 500 nm for air medium and from 800 to 1200 nm for water medium. The PDMS nanoparticles comprise a PDMS polymer having terminal functional group selected from alkyl, alkoxy, vinyl, hydroxyl, or a combination thereof. The sunscreen composition is available in the defined form selected from a group consisting of a skin cream, a skin lotion, a powder, a gel, and a sprayable liquid.