What’s the Bottom Line? What is currently known about dietary supplements for hepatitis C? • No dietary supplement has been proven to effectively treat hepatitis C. • Research on silymarin (milk thistle), the most commonly used supplement for this condition, has not demonstrated meaningful benefits in people with hepatitis C. What is known about safety? • Colloidal silver, sometimes promoted for hepatitis C, is unsafe and may cause permanent and serious side effects. • In clinical studies of