Overall, research suggests that garlic does not lower or affect cholesterol, according to WebMD. Although some research results are inconsistent, high-quality studies do not link garlic to decreased cholesterol levels.
Although rumored to reduce cholesterol in individuals with diabetes, in children who have inherited high levels of LDL cholesterol, and in those with high cholesterol and triglyceride levels, garlic does not actually make a noteworthy difference for any of these conditions, explains WebMD.
Those suffering from numerous conditions that affect the heart and blood system often take garlic as a supplement, according to WebMD. Research does not show it to be effective for reducing cholesterol, but it does seem to reduce blood pressure and slow the development of atherosclerosis.