Garlic's strong odor may be evident when eaten in large quantities. The reason is traced to the sulfur compounds, which get metabolized and form allyl methyl sulfide (AMS). The body cannot digest AMS, so it passes into the bloodstream and gets carried to the lungs and skin. Digestion can take hours, so the garlicky smell may be present for a long time. Some say eating parsley will counteract garlic breath. Others claim that eating garlic can repel mosquitos because of AMS being in the bloodstream. Neither claim has scientific evidence to support it.