Reply To: I've had my levels checked (18.8) and read your chart for a suggested dosage of D3 to take in order to increase these levels. How long should I take the increased dosage before checking my levels again?
I hope the chart you are referring to says 5000iu a day. If you weigh more than an average weight of 150lbs, you may have to take more to get the same results.
I hope the 18.8 was measured as ng/ml and not nmol/l because that would be a different response.
You should take any given amount of Vitamin D for 8 weeks before retesting. Just keep in mind that testing during the spring/summer and part of fall may be influenced by “sunshine” depending if and how much you go outside. So your level could end up a little higher during that time frame.