Green Tea
Popular in Asia for centuries, green tea helps to keep blood pressure under control. It also may help keep cholesterol from clogging arteries. The tea contains Epigallocatechin Gallate (EGCG) and other substances that protect the body against the dangers of oxidation, while helping to keep the harmful LDL cholesterol down and the helpful HDL cholesterol up. They also assist in keeping blood pressure under control.
See also: Tea Helps the Heart.

Garlic
Garlic prevents the oxidation of LDL cholesterol, may prevent the liver from producing excess fat and cholesterol. In one study, adding as little as two ounces of garlic juice to a fatty, cholesterol-laden meal was found to actually lower the cholesterol by up to 7 percent. Another study found that 600 mg of garlic powder a day could push the total cholesterol down by some 10 percent. Other research has corroborated these findings reporting that garlic can lower both total and LDL cholesterol while raising the HDL ("good") cholesterol. A 10-month study found that eating three cloves of garlic a day keeps the cholesterol down for extended periods. And because it contains ajoene and other substances, garlic also helps to keep the blood "thin" and free of potentially deadly blood clots

Hawthorn (Crataegus)
Hawthorn contains a combination of flavonoids that can protect the heart against oxygen deprivation and the development of abnormal rhythms. It dilates coronary blood vessels, improving the flow of blood to the heart. It strengthens the heart muscle and works to help the body rid itself of excess salt and water.  It reduces blood levels of cholesterol and triglycerides, and brings down high blood pressure. Choose a standardized extract containing 1.8 percent vitexin-2 rhamnosides.

Ginger
Ginger is an important herb for a healthy heart. Ayurvedic physicians suggest that eating a little bit of ginger every day will help to prevent heart attack. It reduces cholesterol. It also reduces blood pressure and prevents blood clots. Ginger's heart-helping attributes are similar to that of garlic. Ginger interferes with the long sequence of events necessary for blood clots to form. This helps to prevent clots that can lodge in narrowed coronary arteries and set off a heart attack.

Turmeric
Turmeric lowers blood cholesterol levels by stimulating the production of bile. It also prevents the formation of dangerous blood clots that can lead to heart attack.

Onions
Onions contain adenosine and other "blood thinners" that help to prevent the formation of blood clots. In addition to thinning the blood, onions can help keep the coronary arteries open and clear by increasing the HDL. Eating half a raw onion every day can increase HDL by 20 to 30 percent.

Ginkgo biloba
Ginkgo biloba improves the flow of blood throughout the body. It is also an antioxidant. Ginkgo biloba can benefit the cardiovascular system by preventing the formation of free radicals. Take a ginkgo extract containing 24-percent ginkgo flavone glycosides.