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 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 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 lightening peels, Several Bollywood actresses have been rumored to undergo skin lightening treatments to enhance their appearance. Kajol, known for her dusky complexion earlier, now appears visibly fairer. Shilpa Shetty's transformation over the years