Vitamin E: what it does, how much you need, and how much is too much
By Vita · fact-checked against NIH ODS
Vita is Vitaminico's AI nutrition coach. Every number here is checked against the NIH Office of Dietary Supplements; these pages have not yet been reviewed by our registered dietitians.
A fat-soluble antioxidant vitamin that helps protect your cells from damage.
Vitamin E: key facts
- Everyday need (RDA/AI)
- 15 mg (22.4 IU natural / 33.3 IU synthetic) for all adults
- Safe upper limit (UL)
- 1,000 mg
- Measured in
- mg
- Best foods
- Wheat germ oil, sunflower seeds, almonds and other nuts, vegetable oils, green leafy vegetables
Adult values from the NIH ODS Vitamin E fact sheet. Needs differ in pregnancy, lactation and childhood.
What does vitamin e do?
Vitamin E is a fat-soluble antioxidant that shields your cell membranes from free radicals — unstable molecules made during normal metabolism and by things like cigarette smoke, air pollution, and UV light. It also supports normal immune function and helps keep blood vessels healthy, partly by limiting the clumping of platelets. Because your body stores it in fat tissue, you don't need to hit your target every single day.
Why you might be low on vitamin e
- You have a fat-malabsorption condition such as Crohn's disease, cystic fibrosis, or trouble releasing bile — your gut needs dietary fat to absorb vitamin E
- You follow a very low-fat diet without deliberately including nuts, seeds, and vegetable oils
- You were born prematurely at very low birth weight (under 1,500 grams)
- You have a rare inherited disorder like abetalipoproteinemia or ataxia with vitamin E deficiency (AVED)
- National surveys find most people's diets provide less than the recommended 15 mg/day, though outright deficiency is still rare
Signs of low vitamin e
These are common signals, not a diagnosis — a blood test and your clinician confirm a real gap.
- Nerve damage in the hands and feet (peripheral neuropathy) — often felt as tingling or numbness
- Loss of balance and coordination (ataxia)
- Muscle weakness (skeletal myopathy)
- Vision problems from damage to the retina (retinopathy)
- A weakened immune response
Best food sources of vitamin e
| Food | Typical amount |
|---|---|
| Wheat germ oil | 20.3 mg per 1 tablespoon |
| Sunflower seeds, dry roasted | 7.4 mg per 1 ounce |
| Almonds, dry roasted | 6.8 mg per 1 ounce |
| Sunflower oil | 5.6 mg per 1 tablespoon |
| Hazelnuts, dry roasted | 4.3 mg per 1 ounce |
| Peanut butter | 2.9 mg per 2 tablespoons |
| Spinach, boiled | 1.9 mg per 1/2 cup |
How much vitamin e is too much?
The tolerable upper intake level (UL) for adults is 1,000 mg per day. The UL applies to supplemental forms and is set to avoid bleeding (hemorrhagic) effects; dietary deficiency is rare in healthy people.
You can't get too much vitamin E from food, but high-dose supplements can thin your blood and raise the risk of bleeding and hemorrhagic stroke — the upper limit for adults is 1,000 mg/day (about 1,500 IU of the natural form or 1,100 IU synthetic). Large supplemental doses have even been linked in some studies to a small rise in overall death risk, so more is not better.
Stacking a multivitamin, a single supplement and fortified foods adds up faster than it looks — run your full dose through the free Supplement Safety Checker before adding anything new.
Vitamin E FAQ
Do I need a vitamin E supplement?
Probably not. Most healthy people get enough from foods like nuts, seeds, and vegetable oils, and true deficiency is rare — it mainly affects people who can't absorb fat. High-dose supplements haven't been shown to prevent heart disease or cancer and can raise bleeding risk, so check with a clinician before taking one.
Can vitamin E interfere with my medications?
Yes. Large doses can add to the blood-thinning effect of anticoagulant and antiplatelet drugs like warfarin (Coumadin), raising the risk of bleeding — especially if your vitamin K intake is low. Oncologists also generally advise against antioxidant supplements during chemotherapy or radiation.
What's the difference between IU and mg, and natural versus synthetic?
The daily target is 15 mg. Natural vitamin E (labeled d- or RRR-alpha-tocopherol) is about twice as potent by weight as synthetic (dl- or all-rac-), which is why the 1,000 mg upper limit equals roughly 1,500 IU natural but only 1,100 IU synthetic.
Source
Every RDA/AI, upper limit and unit on this page is drawn from the NIH Office of Dietary Supplements Vitamin E fact sheet ›.
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Educational, not medical advice. The upper limits shown are Tolerable Upper Intake Levels for healthy adults from all sources combined; needs differ in pregnancy, lactation, childhood and with some conditions or medications. This page does not diagnose a deficiency or set your dose — talk to your clinician before starting any high-dose supplement.