Reply To: My husband who is 43 has been taking 100,00 IU of d for a year and his levels have not risen. He works outside for a living so he gets plenty of sunshine. Any suggestions or reasons why someone would not absorb vitamin d?
Research now shows that Vitamin D is best taken everyday. If that is not possible then once a week but monthly does not help.
So if he can and with that low of a level, he should take 8000 -10,000 iu A DAY for 8 weeks and then retest. We promote having a minimum healthy level of 50ng/ml (125nmol/l). So in 8 weeks he should reach that and maybe even be higher. If he does not reach that, then come back and tell me what his level is at that point.
If he tests at a level really close to 50ng/ml, then he should just stay on that amount he is taking. If he ends up higher, then he might be able to go to a maintenance dosage of less. Usually for 150lbs that is 5000iu a day. For him it should be more like 6000iu but might be more.
Right now it just appears that it is a matter of not taking enough and not taking it daily rather than anything else.
Sometimes taking Vitamin D can cause mineral deficiencies. It is usually magnesium that is lacking. So if he starts to have any symptoms come back and tell me and I will help you figure it out and what to do.
If you have any more questions or need help, please come back and tell me.