Results: What were the results? There are differences in results based on the method used and each lab has its own reference range. If your level was less than 30 ng/ml you can safely take 2000 to 4000 units of vitamin D3 daily. Visit this site for info and talk to your doctor: https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/
Answered 9/6/2020
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A doctor has provided 1 answer
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