People commonly use garlic for high blood pressure, high levels of cholesterol or other fats in the blood, and hardening of the arteries. It is also used for the common cold, osteoarthritis, and many other conditions, but there is no good scientific evidence to support these uses.
Garlic May Help Lower Blood Pressure
Reduced Risk of Heart Disease
Garlic for Colds and Flu
That said, one study examined the effects of aged garlic extract on blood clotting among people taking blood thinning medication and found it posed no serious risk. Still, it’s best to speak with a healthcare professional to determine whether black garlic is safe and appropriate for you.