How to correct this deficiency? My vitamin D3 is 12.5 when it should be 30 or above It was revealed in my recent blood test report I have attached the screenshot below   After this I went to doctor to get supplements but he gave some tablet which had a pretty low IU like 400 or something, which is not enough to correct a deficiency, rather it's just for daily maintenance I don't think the doctor understood my problem As far as I know the standard procedure for doctors to correct Vit D deficiency is to prescribe a high dosage corrective plan, in which ask you to take 10,000 IU of vitamin D once per week for several weeks until the deficiency is corrected and your levels reach safe zone, after that they lower the dosage because now the purpose is to maintain the existing levels rather than correct a deficiency. Also unlike other things vitamin D can toxicity and is not flushed out of the body, so taking too much of it is a issue, can a doctor here please guide me regarding this. Thanks.