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A small study published in the European Journal of Clinical Nutrition earlier this year found a daily dose of two pills containing high-potency aged garlic extract could help lower blood pressure.

It’s thought garlic can stimulate nitric oxide in cells, which dilates blood vessels and reduces blood pressure. The head of the study, University of Adelaide researcher Karin Ried, says garlic may have more than one mechanism for lowering blood pressure, which could make it a superior treatment over others though about one-quarter of the participants reported side effects such as bloating, gas and a noticeable garlic taste.

A Cochrane review of garlic hypertension treatment found some supporting evidence for its role in lowering blood pressure, but as with the review of its cold prevention properties there was not enough evidence to determine its medicinal benefit.