It is a good idea to encourage your children to follow the OMS diet recommendations as well as ensuring that they are getting enough vitamin D.
There is good evidence that taking even a low dose of vitamin D regularly substantially reduces the risk of getting multiple sclerosis. Children of people with MS should routinely be supplemented with vitamin D.
Roy Swank noted in his study that there were no new cases of multiple sclerosis in families where everyone followed the same diet as those with MS. It is also easier to cook one meal only, but it may be difficult to get agreement from all family members, especially if they are older.