Hawthorn may boost the heart

The May-blooming hawthorn is also called the mayflower -- the plant for which the ship that ferried pilgrims to Plymouth Rock in 1620 was named. The thorny, white-flowered tree and its berries have a history of use as a food, ceremonial symbol and medicinal herb in Europe, where it’s one of the most popular supplements on the market.

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Uses: The leaves and flowers are taken to strengthen the heart and prevent conditions such as palpitations and congestive heart failure.

Dose: Usually, 250 milligrams, three times a day in pill form, or 2 to 4 cups of tea made from the crushed leaves or flowers.

Precautions: Hawthorn is generally considered safe, though very high doses may cause sedation and steep drops in blood pressure. People who use heart medications should consult a doctor about potential interactions.

Research: Hawthorn contains flavonoids, or plant chemicals, that improve the flow of blood in the heart. In Germany, many studies have shown that the herb can be effective in decreasing heart palpitations; improving heart rate, oxygen intake and exercise endurance; and lowering blood pressure. Other studies suggest it may prove helpful for congestive heart failure patients, but further research is needed to confirm its effects and safety.

Dietary supplement makers are not required by the U.S. government to demonstrate that their products are safe or effective. Ask your health-care provider for advice on selecting a brand.

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-- Elena Conis