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Do Multivitamins Help You Live Longer?

A daily multivitamin does not help healthy adults live longer. A 390,124-person study over 23.5 years and the USPSTF both found no mortality benefit for generally healthy people. The exception: multivitamins do help diagnosed deficiencies, and folic acid before and during early pregnancy prevents neural tube defects.

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In-house · Synthesized from the cited primary sources
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5 min
Steps
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Sources
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What it is

The honest evidence on multivitamins for longevity: they do not extend a healthy adult's life, but there are real, narrow exceptions worth knowing.

Why it works▼
This is one of the largest, longest studies on multivitamins and death risk in healthy adults, and it found no longevity benefit. The USPSTF is the standard body for preventive-medicine recommendations in the US, and it does not recommend multivitamins for this purpose in healthy adults. The claim here is narrow: a daily multivitamin does not extend a healthy adult's life. It is not a claim that all vitamins are useless. Testing finds the deficiency that is actually there, and treating a real gap is where supplementation earns its evidence; a blanket multivitamin does not show a longevity benefit in healthy people.
The evidence
Sources
Primary sources behind this page, cited straight to the source: peer-reviewed papers and reporting. Select any to view it here.
1
Multivitamin Use and Mortality Risk in 3 Prospective US Cohorts (Loftfield et al., JAMA Network Open, 2024)
Paper
2
Vitamin, Mineral, and Multivitamin Supplementation to Prevent Cardiovascular Disease and Cancer: US Preventive Services Task Force Recommendation Statement (JAMA, 2022)
Paper
3
About Folic Acid (CDC)
Article
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The protocol
Clinical strong human trials Mixed some or emerging evidence Commercial weak or unproven, sold widely Equipment / Test not an evidence claim How we grade →
Know what the big study found

Understand the mortality data

In 390,124 generally healthy US adults followed a median of 23.5 years, daily multivitamin use was not associated with lower mortality (an early apparent 4% higher risk was not significant in later follow-up)

This is one of the largest, longest studies on multivitamins and death risk in healthy adults, and it found no longevity benefit.

Loftfield et al., JAMA Network Open 2024
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Know the official guidance

See what USPSTF concluded

The US Preventive Services Task Force gave multivitamin use a Grade I (insufficient evidence) for preventing cardiovascular disease or cancer in healthy adults

The USPSTF is the standard body for preventive-medicine recommendations in the US, and it does not recommend multivitamins for this purpose in healthy adults.

USPSTF, JAMA 2022
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Know the real exception

Understand when vitamins do help

Multivitamins and specific nutrients do help when there is a diagnosed deficiency, and folic acid taken before and in early pregnancy prevents neural tube defects; that is well established

The claim here is narrow: a daily multivitamin does not extend a healthy adult's life. It is not a claim that all vitamins are useless.

CDC / ACOG
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What to actually do

Test before you supplement

Ask your doctor for a basic panel (vitamin D, B12, and iron/ferritin are common ones) and supplement the specific gap it finds, rather than taking a blanket daily multivitamin hoping it helps longevity

Testing finds the deficiency that is actually there, and treating a real gap is where supplementation earns its evidence; a blanket multivitamin does not show a longevity benefit in healthy people.

Loftfield et al., JAMA Network Open 2024 / USPSTF 2022
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Is this for you?
Good fit if
  • Anyone taking a daily multivitamin 'just in case'
  • People wondering if multivitamins are worth it for longevity
  • Anyone with a possible nutrient gap who wants the right next step
  • People who are pregnant or planning pregnancy (see the folic acid exception)
Cautions
  • This is about a blanket daily multivitamin in generally healthy adults, not a claim that vitamins are useless: diagnosed deficiencies and pregnancy-related folic acid are real, well-supported exceptions
  • The main study is observational; it shows association, not proof of zero effect for every individual, though its size (390,124) and follow-up (23.5 years) are unusually strong for this kind of question
  • This page intentionally gives no doses; talk to a doctor and test before supplementing, especially if pregnant, on medication, or managing a health condition
  • Educational only, not medical advice
Common questions
Do multivitamins help you live longer?▾
No, not according to the largest study on the question: 390,124 healthy US adults followed for a median of 23.5 years showed no mortality benefit from daily multivitamin use, and the USPSTF rates the evidence insufficient to recommend them for this purpose.
Should I stop taking my multivitamin?▾
That is a decision for you and your doctor. The evidence says a multivitamin will not extend the life of an already-healthy adult, but that does not mean multivitamins are harmful or useless for someone with a diagnosed deficiency.
Are there any real benefits to multivitamins?▾
Yes, for specific situations: treating a diagnosed nutrient deficiency, and folic acid taken before and during early pregnancy, which prevents neural tube defects. Those are established exceptions to the general 'no longevity benefit' finding.
What should I do instead of just taking a multivitamin?▾
Ask your doctor about testing common deficiencies like vitamin D, B12, and iron, then supplement the specific gap if one is found, rather than blanket-dosing on a multivitamin and hoping it helps.
Is this study strong evidence?▾
Yes, relative to most nutrition research: it pooled three large, geographically diverse US cohorts (390,124 people) with over two decades of follow-up, which is why the USPSTF's own insufficient-evidence conclusion lines up with it.
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Update history
  • July 9, 2026 Protocol published.
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Not medical advice. This page is for education only and is not a substitute for professional medical care. Consult a qualified clinician before changing your health routine.
Editorial disclosure. This protocol is written and fact-checked by the YourProtocol.ai editorial team directly from the primary sources cited below; it is not written or reviewed by any outside expert.

Do Multivitamins Help You Live Longer?
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