Nonsense - many people have vitamin d levels occurring naturally that are around 220. Where does the GP get the evidence that vitamin d levels of 220 cause dizziness and/or constitute toxicity? Dizziness is a symptom of MS. Reducing vitamin D levels may actually make dizziness and fatigue worse (that is my direct experience telling you this after following similar advice a GP)http://overcomingms.org/recovery-progra ... vitamin-d/
I am sorry that the two of you have to deal with this ignorance. Please see the section on vitamin D and MS and this from the encyclopeida section of this website:
"There is evidence that optimal levels in general are much higher, and almost certainly so for people with MS. The recommended daily allowance of vitamin D in Australia is 200 IU. This amount of vitamin D is way too low. It is based on the amount required to prevent rickets. It is equivalent to the amount of vitamin D your skin would make in 6 seconds of all-over sun in Perth on a summer’s day. Vieth and others have shown that in sunny countries the vitamin D levels should be at least 100-140nmol/L, and more like 135-225nmol/L, while a level of 200nmol/L may actually be optimal.25 Others have suggested a level as high as 250nmol/L may be optimal.26 To achieve a level of 100nmol/L requires daily intake of about 4,000 IU of vitamin D for people who get no sun. To get to 140nmol/L without any sunlight, you’d need to take about 10,000 IU a day. It has been shown that the average healthy man’s body uses about 3,000 to 5,000 IU of Vitamin D a day,
It is not possible to get vitamin D toxicity from the sun. Only supplements can potentially produce toxic levels. However, the only published toxicity is from supplements of 40,000 IU a day."
My suggestion would be to find another GP. The dizziness could be MS related or could be something else - that needs to be further investigated. I am not a doctor - I hope that George or someone suitably qualified finds this post, but in the meantime, consider taking at least 5000 IU of vitamin D per day - when I took my GP's advice to stop taking vitamin D it lead to a nasty relapse.