Tulsi ark, or holy basil extract, has several health benefits according to Ayurveda and science. It is a powerful combination of antioxidants, antivirals, antibacterials, and antitoxins that can regulate blood pressure and cholesterol, boost immunity, manage stress, control blood sugar, reduce inflammation and aid digestion. Tulsi ark is made from several types of tulsi/holy basil and manufactured through a distillation process to preserve the oils and aroma. It is commonly available in India from brands like Baidyanath, Zandu, and Dabur.