Dr Reddy's Laboratories today announced the launch of Shadowz, a sunscreen gel.According to a release issued by the company to the BSE today, Shadowz offers high sun protection factor for patients prone to or suffering from melasma and photo dermatitis."It has an SPF rating of 30 and is being initially offered in a 100 ml bottle with a flip cap," the release said.Shadowz effectively prevents damage from both UV-A & UV-B spectrum of UV radiation. Its unique, transparent gel will enhance patient compliance by increasing the ease of application, the release added.