Give your mind and body a powerful, stress- proofing herbal boost with guaranteed-potency Holy Basil (Tulsi) Extract capsules from Swanson Superior Herbs. For more than 5,000 years, Ayurvedic herbalists have revered holy basil (also known as tulsi) as one of nature's premier adaptogens, which helps protect both body and mind during times of stress. Modern research has revealed that holy basil features constituents like oleanolic acid and other triterpenoid compounds that support the liver, the immune system and vital functions throughout the body. Our Holy Basil (Tulsi) Extract is standardized to 0.75% oleanolic acid content for reliable potency in each veggie capsule.