Originally posted by Twenty Miles
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See his post
"Topping up your vitamin D tank"
It isn't necessarily the case that using 20.000iu/d will mean double the speed at which your 25(OH)D level is restored as the more you take the more your body will reject.
The only way you can be sure you've made the target 25(OH)D is to get retested and be guided by the result.
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