Garlic is good... And bad for some as well. Garlic is a known antihyperlipidemic food (used to lower fat in the body, and can also lower cholesterol) but it also possesses a salicylate containing compound, so basically it works by "thinning" the blood. It maybe good if you are not taking ASA (Acetylsalicylic acid, commonly known as Aspirin) but if you are taking it, then the chances of you bleeding will get slightly higher.