Deepika, Kajol, Bipasha': Did Kangana Accidentally Name Bollywood Actresses Who Have Undergone Skin Lightening Treatment? Republic World 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 Secret Behind Kajol's Timeless Glow: Glutathione Have you ever wondered how Kajol went from looking gorgeous to absolutely radiant? Meet Glutathione, your body's superhero! Painless Treatment Kajol Skin Lightening Secret Natural Way. Natural Glutathione Drink : 1. Boil 1 2 litres of water. 2. Grate 1 tablespoon of raw haldi Helps in skintone lightening and fades dark spots