How to read my vitamin D results in my blood test results? Also, is vitamin D 3000-4000 units a day safe for older adults that are in heart medication and other meds -
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Frontiers | Vitamin A, D, and E Levels and Reference Ranges for Pregnant Women: A Cross-Sectional Study 2017–2019
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Vitamin D : Why you may not be getting enough and how to prevent deficiency. — Natural Health-Naturopath Auckland-Katherine Matthews
![Table 2 from Population Reference Values for Serum Methylmalonic Acid Concentrations and Its Relationship with Age, Sex, Race-Ethnicity, Supplement Use, Kidney Function and Serum Vitamin B12 in the Post-Folic Acid Fortification Period Table 2 from Population Reference Values for Serum Methylmalonic Acid Concentrations and Its Relationship with Age, Sex, Race-Ethnicity, Supplement Use, Kidney Function and Serum Vitamin B12 in the Post-Folic Acid Fortification Period](https://d3i71xaburhd42.cloudfront.net/e61e7bd4ea5bf2ecfaae0f0d78f6915e7d0fce3b/4-Table2-1.png)
Table 2 from Population Reference Values for Serum Methylmalonic Acid Concentrations and Its Relationship with Age, Sex, Race-Ethnicity, Supplement Use, Kidney Function and Serum Vitamin B12 in the Post-Folic Acid Fortification Period
![Reference intervals for measured and calculated free 25-hydroxyvitamin D in normal pregnancy - ScienceDirect Reference intervals for measured and calculated free 25-hydroxyvitamin D in normal pregnancy - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0960076017303758-fx1.jpg)
Reference intervals for measured and calculated free 25-hydroxyvitamin D in normal pregnancy - ScienceDirect
![Table 2 from Vitamin C Deficiency of Korean Homeless Patients Visiting to Emergency Department with Acute Alcohol Intoxication | Semantic Scholar Table 2 from Vitamin C Deficiency of Korean Homeless Patients Visiting to Emergency Department with Acute Alcohol Intoxication | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/085c7789871b243c809025b4b9962b9fef7dd366/2-Table2-1.png)