Answer

Is 5000 IU of vitamin D too much?

Vitamin D vitamin-d dosage safety

By Arun AgrahriLast reviewed 2 timecoded sources

Short answer

For some people, no. All eight sources Precis counts, two on tape and six studies, find 5,000 IU a day safe for some people. A cohort study of pregnant women, read in full, judged 5,000 IU a day safe. It sits above the 4,000 IU upper limit, so test your level first.

Best for:
people who take 5000 IU of vitamin D a day.
Price:
Free to read, with every receipt. Pro is $9 a month or $79 a year and adds AI Ask.
Based on what researchers say in public interviews on YouTube. Educational only, not medical advice. Ask a qualified clinician before changing a supplement, medication, treatment, or testing plan.
Leaning for

Vitamin D supplements are worth taking.

The verdict on Vitamin D overall. 12 sources: 6 positive, 6 partly

What the evidence says

positive partly neutral negative Each researcher and each study counts once per claim, however often they come up.

  1. Strong consensus for

    5,000 IU of vitamin D3 a day is a safe dose for some people.

    8 sources: 8 positive.

    Researchers say

    1 positive

    Studies show

    7 positive

    6 papers we read · 1 cited on tape, not yet checked against the paper

    24 more not counted · see why
    We could not tell what position it takes on this claim. 10
    The study is not yet read in full. 7
    A host's remark inside an interview. 2
    We could not tell where the evidence comes from. 2
    We could not confirm who is speaking. 2
    The study cited could not be identified. 1
    Show the receipts from 8 sources

    1. Mark Hyman, on The Dr. Hyman Show, at 40:05 Video · positive · Opinion

      “the range I usually recommend is two to 5,000 units a day”

    2. Mayo Clinic, cited on FoundMyFitness, at 50:53 Study · positive

      “One person had hypercalcemia out of those 20,000 and they had ranges people supplementing anywhere from 0 to 55,000 units a day”

    3. Other primary study, Int J Mol Sci, 2012, PMID 23202962 Study · positive

      Vitamin D intake over 10 years caused no adverse effects: no hypercalcaemia, nephrolithiasis or hypercalciuria were observed.

    4. Other primary study, J Steroid Biochem Mol Biol, 2019, PMID 30611908 Study · positive

      In summary, long-term supplementation with vitamin D3 in doses ranging from 5000 to 50,000 IUs/day appears to be safe.

    5. Controlled trial, Nutrients, 2019, PMID 30634590 Study · positive

      Administration of vitD3 + PBA daily for 16 weeks was safe and well-tolerated and the numbers of clinical AEs were not different between the groups.

    6. Other primary study, Epilepsy Behav, 2019, PMID 30970298 Study · positive

      High-dose oral Vitamin D3, 5000 IU/day was safe and well tolerated in subjects with epilepsy.

    7. Other primary study, PLoS One, 2020, PMID 32298329 Study · positive

      Of three used regimens, the dose of 5000 IU/day is considered safe and equally effective as of 200000 IU stat.

    8. Other primary study, J Steroid Biochem Mol Biol, 2023, PMID 37182752 Study · positive

      The current findings complement our experience with over 7000 patients in the past 13 years, indicating that prolonged daily oral intake of vitamin D3 ranging from 5000 to 10,000 IU/day is safe.

Precis is not affiliated with or endorsed by YouTube or by any researcher, show or publisher we quote. We take no sponsorship, ad or affiliate money, and every verdict is our own review of what was said. How we stay independent

Detailed Answer

What the counted sources say

Eight sources count toward this claim, and all eight back it. Two are on tape. Six are studies Precis has read: three in full and three from the abstract only.

"The range I usually recommend is two to 5,000 units a day," Mark Hyman says on his own show. In the same passage he says to check your level, and that fixing a deficiency takes months.

Roger Seheult, a guest on Rhonda Patrick's show, describes a Mayo Clinic records study in which one person in 20,000 had high blood calcium. Precis read that study in full. Its main point matches what he says, but the figures slip. The study counts blood tests, not people, and it reports no 0 to 55,000 IU range.

What the studies show

The six counted studies are small, and most had no comparison group. A cohort study of pregnant women judged 5,000 IU a day safe. A 10-year case report of a woman with multiple sclerosis found no high blood calcium, kidney stones or high urine calcium. Precis read both in full.

Three more were read from the abstract only. A pilot in people with epilepsy found 5,000 IU a day safe and well tolerated. A seven-year hospital review found that 5,000 to 50,000 IU a day appears safe. A report on 14 hospital patients found normal urine calcium on doses in that range.

The one controlled trial, in people with HIV, gave vitamin D3 with another drug. Side effects were no more common than on placebo.

Where the 4,000 IU limit fits

In the same interview, Patrick notes that the Institute of Medicine set the upper limit at 4,000 IU a day. Host remarks inside an interview are not counted, but 5,000 IU sits above that line. The harm to watch for is high blood calcium.

Among the studies attached but not counted are two pooled analyses of long-term trials, read only from the abstract. One reports more high blood and urine calcium on vitamin D, not tied to the dose. The other found no rise in kidney stones but a trend toward high blood calcium.

What no study here has tested

No counted study is a large trial of 5,000 IU a day against placebo in healthy adults. Most studied special groups: pregnant women, people with epilepsy, HIV or multiple sclerosis, and hospital patients. Before you settle on 5,000 IU, get a 25-hydroxy vitamin D blood test and talk to a clinician, above all if you plan to stay above 4,000 IU.

Related Questions

Is 5000 IU of vitamin D safe to take daily?
For some people, the sources Precis counts say yes, but most of those studies tested special groups. It sits above the 4,000 IU upper limit, so confirm it with a 25-hydroxy vitamin D test rather than dosing blind.
What vitamin D level should I aim for?
Hyman, on his own show, says 50 to 75 ng/mL is usually a good level for his patients. That remark is not counted on this claim, and no study here tests a target. Test, then dose to your result with a clinician.
Should I take K2 and magnesium with vitamin D?
Hyman pairs D3 with magnesium, which he says the body needs to activate vitamin D, and with K2, which he says activates a protein called osteocalcin. No study on this page tested the pairing.
Can you take too much vitamin D?
Yes. Too much can raise blood calcium. Two pooled analyses of long-term trials point that way, though Precis read only their abstracts and does not count them. One found more high blood and urine calcium, the other a trend toward it.

More Questions About Vitamin D

How much vitamin D should you take per day? Should you take vitamin D with K2? Should you take vitamin D with magnesium? Is vitamin D3 better than D2?

Precis membership

Get the exact protocol for Vitamin D

The answer above is the whole answer: the verdict, every counted mention, where the sources disagree, and the receipt behind each one. Nothing on this page is held back.

A free account adds

  • Each dose named on the record, and the form named with it
  • Timing, and what to take it with or keep it away from
  • The interactions flagged by name

Pro adds

  • Chat answers drawn from 3,700+ hours of recorded interviews with 380+ researchers and doctors, plus 87,700+ research studies, each with a timecode
Go Pro — $9/mo or $79/yr

Full Vitamin D evidence report

The verdict on every claim, and where the sources disagree

How Precis checks a claim · Report an error

All answers