On a day-to-day basis, supplementing with 5,000 IU of vitamin D daily during winter may be how much vitamin D someone with multiple sclerosis should take.
- Those who get less sun might need 10,000 IU of vitamin D in winter and 5,000 IU daily in summer.
- The most you can take without risk of serious side effects is 10,000 IU per day.
- We endorse this for people with MS and 5,000 IU a day for their family members.
- Note that children need proportionally smaller doses.
People with MS can feel comfortable that sunlight is likely to improve their health outcomes. Research suggests strongly that high-normal vitamin D levels are required for people with MS. In many centers, this has become accepted medical practice in the treatment of MS.