Vitamin D and MS

As autumn arrives, we look at what that means for your vitamin D levels

Researchers believe there are a range of environmental and genetic factors which cause multiple sclerosis (MS). Countries further away from the equator have the highest prevalence of MS, and this has led to further research into the potential role vitamin D could have in MS.

NHS guidelines state that between October and March in the UK, there is not enough sunlight available for our bodies to make enough vitamin D.

Certain people may not make enough vitamin D even in the summer months. If you have dark skin, for example if you have South Asian, African, or African-Caribbean ethnicity, you require longer in the sun than people with lighter skin in order to make enough vitamin D.

While the role of vitamin D in MS isn’t fully understood, experts agree it’s a good idea to supplement the nutrient, especially if you have MS.

Dietary supplements of vitamin D can be found in two different forms – vitamin D2 and vitamin D3. Many studies show that vitamin D3 is more effective than vitamin D2 at raising the blood level to the required amount.

Vitamin D levels are mostly measured in nanomoles per litre (nmol/L) and supplements are usually prescribed in international units (IU). For the general population, Public Health England recommends a daily dose of 10 micrograms, which is the same is 400 IU. They also state that products providing up to 25 micrograms or 1000 IU are suitable for everyone. This amount is in relation to bone health and not MS specifically. A higher level may be required for people with MS to receive the same effect on blood levels.

Most neurologists advise a daily dosage of anything between 2,000 IU to 5,000 IU and like their patients to have a vitamin D level of above 75 nmol/L. Dr George Jelenik’s Overcoming Multiple Sclerosis (OMS) programme recommends a daily dosage of 5,000 IU in summer and 10,000 IU in winter.

Their programme states the most you can take without risk of serious side effects is 10,000 IU per day.

As always, consult with a medical professional (your GP, MS nurse or neurologist) before taking new supplements.