Price for bunch. Garlic is an excellent source of vitamin B6 vitamin C and manganese. When supplemented properly garlic can help the body fight some of the most common sicknesses such as cold and the flu. Garlic also has the power to reduce high blood pressure and improve cholesterol levels. Garlic contains antioxidants that may help prevent Alzheimer's disease and dementia. In addition to these things, garlic has improved benefits for those who regularly work out.