Vitamin D RDA 600 iu/day D3 Max routine daily intake 4000 iu/day D3 Daily 800-4000 iu D3 (cholecalciferol) Weekly 50,000 iu D3 or D2 (ergocalciferol) Ensure 1000 mg of calcium/day Other research findings: 500,000 iu once a year D3 was NOT effective toxicity at 60,000 iu D3 DAILY 1500/day=10,500/week=45000/month
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