For a mass-produced OTC vitamin this appears to provide me with some additional energy & increased resistance to colds, flu, etc. I'm not a vitamin/suppliment "nut" as I was (for a period of time) after I was 1'st diagnosed with MS in the late 1970's. However I feel that maintaining good overall health is very important, regardless of living with MS. I can only believe that maintaining our overall health can do nothing but help us in our daily lives while living with & managing our MS.