Is Your Vitamin D Level Too High? - GrassrootsHealth
Figure 1 from Safety and Efficacy of Weekly 30,000 IU Vitamin D Supplementation as a Slower Loading Dose Administration Compared to a Daily Maintenance Schedule in Deficient Patients: A Randomized, Controlled Clinical
Vitamin D Toxicity - Symptoms, Diagnosis, Treatment : Dr. Zaidi
Taking too much vitamin D can cloud its benefits and create health risks - Harvard Health