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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The potential role of vitamin D supplementation as a gut microbiota modifier in healthy individuals | Scientific Reports
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Low Vitamin D Levels and Low Vit D in Parathyroid Disease and Hyperparathyroidism. Low Vitamin D Is Not Good For You!
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Frontiers | A Basic Review of the Preliminary Evidence That COVID-19 Risk and Severity Is Increased in Vitamin D Deficiency
How to increase my vitamin D level from 7? Does a vitamin D deficiency cause blackouts/fainting feelings while working out - Quora
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