Garlic has been used for thousands of years to aid in immune system health. According to Dr. John Courtney, using the whole clove is essential for getting all of the active factors, some of which include allicin, methyl allytrisulfide and sulfur. The high sulfur component of garlic makes it very helpful in liver detoxification as it opens up the sulfation biochemical pathways. Sulfur is an important element in the formation of cortisol which decreases pain and inflammation.