What is vitamin E?
Vitamin E is a fat-soluble vitamin, meaning it dissolves in fat. It's also commonly called "tocopherol."
Its most important job is antioxidant protection (keeping cells from breaking down, the way metal rusts). It especially protects the fatty membranes around cells, which helps protect blood vessels and skin.
Because it's fat-soluble, it tends to build up in the body. So this is not a vitamin where more is better. That's a big difference from vitamin C.
Vitamin E benefits: where it may help
- Circulation: used for circulation problems in the hands and feet caused by oxidative damage. Popular with people who have tingling hands and feet, calf swelling or leg pain.
- Skin: clears harmful compounds (free radicals) created by UV rays, which matters for skin aging.
- Menopausal hot flashes: research suggests it may help with facial flushing by strengthening blood vessels.
- Eyes: it's part of the formula from the large macular degeneration study (AREDS2), along with lutein, vitamin C and zinc.
- Fatty liver: there's a fair amount of research suggesting it helps with nonalcoholic fatty liver (fatty liver not caused by alcohol).
Foods rich in vitamin E include almonds, walnuts, avocado and pumpkin. The vitamin E in food is the natural form, so getting it from food is a good option too.
Vitamin E daily dose: don't go over 400 IU
Bottom line: if you take a supplement, keep it at 400 IU a day or less, and only for as long as you need it.
| Category | Amount |
|---|---|
| What your body needs | About 12–15 mg a day (the amount in a multivitamin) |
| For a specific goal like circulation | About 400 IU a day |
| In eye supplement formulas | About 200 IU a day |
| Line not to cross | 400 IU a day |
An analysis (a 2005 meta-analysis) found that people who took 400 IU or more for a long time actually had higher overall death rates. That's why most experts treat 400 IU as the upper limit.
Converting IU and mg: if the label lists only mg, multiply by about 1.5 to get IU for the natural form. The synthetic form converts differently, so at the same IU, your body actually gets less to use than with the natural form.
Types of vitamin E: natural vs synthetic, and tocotrienols
| Type | On the label | What to know |
|---|---|---|
| Natural tocopherol | d-alpha tocopherol | The form your body recognizes and uses best. If you take a supplement, natural is recommended. |
| Synthetic tocopherol | dl-alpha tocopherol | Cheap. At the same IU, the actual weight (mg) is different. |
| Tocotrienols | tocotrienols | Concentrate much more in cell membranes and reach the brain, hands and feet, and organs well. Some say they're stronger for liver health and inflammation. |
| Blend | mixed tocopherols & tocotrienols | Contains both tocopherols and tocotrienols. A safe choice. |
Vitamin E side effects and precautions
Bleeding may be harder to stop. Vitamin E has a blood-thinning effect. So in large amounts, you may bruise easily or bleed more. Some research suggests high doses may raise the risk of bleeding in the brain.
Always talk to your doctor if you:
- Take blood thinners (warfarin, aspirin, clopidogrel, etc.): the drug's effect gets stronger and bleeding risk goes up. If you take vitamin E at all, keep it at 400 IU or less and talk to your doctor.
- Have surgery or a dental procedure coming up: stop 3 days to 1 week before.
- Are getting cancer treatment: antioxidants may interfere with treatment.
Other side effects:
- Toxicity at high doses: it's fat-soluble, so it builds up in the body. It may strain the liver.
- Itching and hives: rarely, allergic reactions happen. Mild itching at first may fade within 1–2 weeks, but stop if it's severe.
- If bruising, bleeding gums or nosebleeds become more frequent, stop right away.
Medications and conditions to watch
- Caution Blood thinners such as warfarin or clopidogrel — Higher bleeding risk — talk to your doctor, and if you take it, keep it at 400 IU or less
- Check Aspirin — Higher bleeding risk — talk to your doctor
- Caution Cancer treatment — Antioxidants may interfere with treatment — talk to your doctor
- Check Surgery or dental procedures — Bleeding risk — stop 3 days to 1 week before
- Note Multivitamin — Doubles up on vitamin E — keep the combined total under 400 IU
Combinations
How it appears on the label
| On the label | What it is | What it means |
|---|---|---|
| d-alpha Tocopherol | Natural vitamin E (d-alpha) | Natural if it starts with d- |
| dl-alpha Tocopherol | Synthetic vitamin E (dl-alpha) | Synthetic if it starts with dl- |
| Mixed Tocopherols | Mixed tocopherols | A blend of several forms of E |
Want it in one pill with others? Compare eye health combos →
What about Kirkland Signature Vitamin E from Costco? →
Frequently asked questions
How much vitamin E do I need a day?
Your body needs about 12–15 mg a day, and the amount in a multivitamin is enough. Even if you take it separately for a specific goal, don't go over 400 IU a day.
Is it OK to take 400 IU of vitamin E every day?
Many experts consider up to 400 IU a safe range. But taking it longer isn't better, so it's best to take it only for as long as you need it for a specific goal.
What's the difference between natural and synthetic vitamin E?
If the label says d-alpha, it's natural; dl-alpha means synthetic. Your body uses the natural form better, so it's the recommended choice for supplements.
Can I take vitamin E if I take aspirin?
Vitamin E also thins the blood, so taking them together may raise bleeding risk. Always talk to your doctor, and if you take it, keep it at 400 IU or less.
Should I stop vitamin E before surgery?
Yes. Because of bleeding risk, stopping 3 days to 1 week before surgery or a dental procedure is recommended. Tell your doctor about your other supplements too.
Vitamin E makes me itchy. What should I do?
Allergic reactions can happen, though rarely. Mild itching sometimes fades after 1–2 weeks, but if you get hives or it gets worse, stop taking it.
Can I take vitamin E with vitamin C?
They actually make a great pair. Vitamin C revives worn-out vitamin E so its antioxidant effect keeps going.
Related concerns
Last updated 2026-10-12