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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DocHQ Vitamin D Rapid Self-Test Kit - Health Screening - Fast Results in 10 Minutes, Vitamin D Level Insufficiency Deficiency, Rapid Test Cassette
![Low Vitamin D Levels and Low Vit D in Parathyroid Disease and Hyperparathyroidism. Low Vitamin D Is Not Good For You! Low Vitamin D Levels and Low Vit D in Parathyroid Disease and Hyperparathyroidism. Low Vitamin D Is Not Good For You!](https://www.parathyroid.com/images/VitaminDvsCalcium2.gif)