4. Hepatitis C
B12 can actually be useful in combating a wide range of different conditions and another one of these is hepatitis C. This is because B12 is able to improve the body’s immune system. And through this mechanism, studies suggest that B12 supplementation might be able to reduce the risk of hepatitis C by as much as 34%. It may also help to make other types of treatment more effective and more likely to solve the problem.