The Vitamin D Council suggests that between 2,000 iu
and 5,000 iu of oral vitamin D3 is
the amount that healthy adults need to take. The naturopath I went to said that 5,000 iu is necessary as the maintenance dosage. For me, what the naturopath told me is what has proven true in my own case. The FDA didn't do people a favor for avoiding vitamin D deficiency by not recommending nearly enough. People are still deficient.