I have MS and started supplementing with high dose vitamin D3 over 10 years ago now.
I read several articles giving conflicting advice about the optimum level of D3 supplementation for MS patients. At first I was aiming for 80 nmol/L, then 150-200 nmol/L and I even read an article suggesting that vitamin D3 toxicity only occurred above 500 nmol/L.
So I relaxed my guard, stopped having 25OHD tests and I gradually upped my intake of D3 supplements such that I've been taking 10,000-15,000IU per day for the last 2-3 years. I recently got tested and my total vitamin D level came back at greater than >375 nmol/L (exact amount wasn't given) and so I've stopped taking my D3 and calcium/magnesium supplements now. I have some symptoms that could be attributed to vitamin D3 toxicity as well as the MS or other things, such as acute constipation, fatigue, muscle weakness, backache, grit in my urine, pains in chest, however my adjusted serum calcium level was normal at 2.54 mmol/L.
So anyway, my question is, how long will it take for my D3 levels to fall within an acceptable range now that I’ve stopped the supplements?
I’m getting conflicting advice, one says 2 weeks, one says 3 months?