My Vit D level has been low for a few years – around 30nmol. I am 38yo female with 2 kids. I had a well-woman exam on 9/25 where I voiced concerns of hair loss, fatigue and chronic headaches. My labs show Vit D is slightly lower now at 27. No prescription was given – just suggested that I take 1,000iu supplement. Research led me to your site and I have since ordered the Bio Tech D3 Plus (5,000iu of D3 with K2, Magnesium, Boron and Zinc) that should arrive tomorrow. My question is, do you think I should get an additional D3 supplement to increase my initial intake? I see in the comments below where others are taking much higher dosages initially and then following with 5,000iu for maintenance. Thanks for your help!