For centuries, Scandinavian folk medicine has used Shark Liver Oil (SLO) to treat various ailments, including cancer, heart disease, wounds, and infertility. But does it work, or could it cause more harm than good? According to WebMD, shark liver oil is an ingredient used in medicine to boost the body’s immune system, fight colds and flu, prevent radiation sickness, and treat leukemia and other cancers. Although the Mayo clinic deems shark oil supplements generally safe, the