Reply To: I have just received my Vitamin D test result for 7th January which was 156.2 nmol/L (Total Vitamin D) (153.4 nmol/L D3 and 2.8 nmol/L D2). I also had my Vitamin D levels tested on 20th December 2017 and came back as 108.1 nmol/L (which I thought was too high and so wanted a 2nd test done). I have been taking Vitamin D3 supplements (4000IU) once a day (with 100mcg Vitamin K2) since 20th November 2017. I would not have thought that my Vitamin D level would reach such a high level with 4000IU per day which I believed to be a safe dosage (the Vitamin D Council website recommends 4000IU per day)? What would you suggest I should I do?