12 All Natural Antibiotics Oregano/Oil of Oregano. We think of oregano as something to add to your favorite Italian dish, however, many go on without realizing how beneficial oregano is to your health! ... Raw Apple Cider Vinegar, or ACV. ... Honey. ... Turmeric. ... Grapefruit Seed Extract (GSE). ... Garlic. ... Echinacea. ... Cabbage. More items...