Many heart attacks or strokes occur when a blood clot gets stuck in a partially clogged artery. In some studies, blood platelets from people who were given garlic supplements took longer to aggregate, or clump together, in a test tube. Aggregation is the first step in forming a blood clot. Heart attacks . Intermittent claudication .
Some people feel pain when they walk because the arteries in their legs are clogged.
There's not enough evidence to say whether garlic can help. Blood pressure . Fourteen of 17 studies found no benefit from garlic. The other three detected small declines of only two to seven percent. Blood sugar .