What do you think Kajol must have done to lighten her skin tone?, From a Dermatologist's perspective, she could have undergone 'GLUTATHIONE' Treatment, IV along with some skin brightening and The Internet Is Obsessed With Kajol's Transformation But What's the Secret? Google it, and the first thing you'll see is IV Glutathione. Some call it a magical fairness treatment, but is that The Internet Is Obsessed With Kajol's Transformation But What's the Secret? Google it, and the first thing you'll see is IV Glutathione. Some call it a magical fairness treatment, but is that The truth about Glutathione! Ever wondered how Kajol transformed her skin? Contrary to popular belief, it's not just about glutathione injections. Here are some key facts you should know before 10 years ago, Kajol had noticeably dull and tanned skin And today, her skin looks much brighter and clearer. She says it's because she used to shoot under the sun without sunscreen,