Anne Truong MDMen's Sexual Health Doctor

How Much Vitamin D3 Should You Take Daily? 💊 #VitaminD #Health

21 Sept 2026 · 1 min

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Dr. Anne Truong recommends 2,000 IU of vitamin D3 daily for most people, with a recheck after six weeks. If oral supplements don't raise levels, she prescribes weekly injections of 50,000 IU instead, since absorption varies based on gut health.

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Vitamin D3, at least about 2,000 units, international units, 2,000 IU a day. So if you take that and in about 6 weeks get your blood work measured, and you can see it go up or not at all. Because when you take it orally, your stomach has to absorb it, and then your body has to absorb it as well. It depends on the lining of your stomach. Some of my patients need injections of vitamin D3. Once a week, and we give 50,000 units of vitamin D3 injection once a week for that.