Garlic happens to be a unique repository for a wonder compound called allicin, which has antibacterial properties, can lower blood pressure, and is great for overall gut health. Robinson says, though, that in order for allicin to be created, it must first be pressed, sliced, or mashed and then must sit for 10 minutes before you cook it (otherwise the heat destroys the effect). Other allicin-rich foods include wild spring onions (be sure to eat their nutrient-dense green stalks), scallions, and leeks.