Garlic (IMAGE) American Chemical Society Caption Compared to bottled garlic, fresh garlic contains higher levels of an ingredient called allicin, which can help prevent blood clots and bacterial infections. Credit Courtesy of Bruce Fritz Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.