1) TIENS Natto Extract Capsules contain nattokinase and other ingredients like lecithin, vitamin C, and garlic extract that help prevent cardiovascular diseases by dissolving blood clots and reducing cholesterol. 2) Nattokinase is the main active ingredient extracted from natto, a fermented soy food from Japan. Laboratory tests show it can dissolve blood clots. 3) The capsules are targeted towards those with a risk of heart attack or stroke, high blood pressure or cholesterol, poor circulation, or a sedentary lifestyle. They are recommended for prevention and treatment of conditions like thrombosis.