Garlic is a good thing, and there will be no problem if you take it for a long time. Shandong people have taken it for more than two thousand years. Garlic contains alliin, which is oxidized into allicin by air. It can dilute blood, reduce blood lipid and blood sugar, prevent the synthesis of cholesterol in the body, prevent platelet aggregation, clean blood vessels, and make blood in blood vessels unobstructed; Can eliminate fatigue and restore physical strength; Has antibacterial, antiviral and anticancer effects; It can also resist aging and has a certain effect on treating impotence. Pay attention to avoid its side effects and some contraindications when eating, and choose the appropriate time and dosage. Heating will gradually lose the efficacy of garlic, so it is best to eat it raw or process it with sweet and sour. Choosing garlic slices (non-garlic oil products) is the most ideal. Good garlic slices are enteric-coated tablets and will not be destroyed by gastric juice. Capsule products should pay attention to the manufacturer's brand and whether it is safe.