Cauliflower
Cauliflower is another of those cruciferous vegetables that are chock-full of pesky sulfur compounds that make your BO a little more pungent than it has to be. The reason why this occurs is because our body only has a certain amount of enzymes that can break down sulfur, and some people are more likely to have them than others. That explains why you could have a week full of cauliflower and not smell, while someone else only has a cauliflower lunch to have it emanating from their pores.