Reply To: Hi, I measured my Vitamin D for the first time in January in order to try and get my PCOS in order. It was only 20. Since then I have taken 5000iu D3 daily and it has just risen to 42. I will continue taking 5000iu and measure my value again in three months. Do I need to take more than the RDI of vitamin K if I take such doses of vitamin D or is a supplement of 9 mcg enough in either case (disregarding addition from diet)?