By Cynthia sass, R.D.

Do they really work?

Yes, but it’s important to weigh the benefits against the risks. Herb like ginseng, guarana, hoodia, and red clover may help dial down hunger. But taking large doses or combining multiple herbs that contain stimulants can be dangerous, causing high blood pressure and seizures even if you’re young and healthy. Talk to your doctor before taking any appetite suppressants, and keep doing the things that naturally help you eat less, such as eating a healthy diet and exercising. A British study found that an hour of vigorous cardio had a positive effect on hunger-controlling hormones for up to two hours after the session.

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