Vitamin E: Natural vs Synthetic
Spotted "d-alpha", "dl-alpha" or "mixed tocopherols" on a label and not sure what they mean? You are not alone. This page decodes the forms of vitamin E, converts IU into milligrams, sets out the EU reference amount and upper limit, and flags the medicines worth checking first.
What vitamin E is and what it does
Vitamin E is the name for a family of fat-soluble compounds, the tocopherols and tocotrienols. The form the body maintains in the blood and tissues, and the one used to set intake recommendations, is alpha-tocopherol. Vitamin E sits in cell membranes, where it acts as an antioxidant that interrupts chain reactions involving free radicals. It is also used by food makers as a natural antioxidant to keep oils fresh.
The EU has authorised one health claim for vitamin E, about its role in protecting cells, shown word for word in the claims box below. Most people get enough vitamin E from a varied diet, and noticeable shortfalls are uncommon in healthy adults.
Forms you'll see on labels
| Form | What to know |
|---|---|
| d-alpha-tocopherol (natural, also RRR-alpha-tocopherol) | The natural form. Per milligram it is more potent: 1 mg of natural equals about 2 mg of synthetic. |
| dl-alpha-tocopherol (synthetic, also all-rac) | Laboratory-made form, common in multivitamins. Note the extra "l". |
| Tocopheryl acetate or succinate | Esters of either form, more stable in tablets. The "d-" or "dl-" prefix tells you which base form is used. |
| Mixed tocopherols | Alpha plus beta, gamma and delta tocopherols, often from vegetable oils. Only the alpha portion counts towards the NRV. |
| Tocotrienols | Related compounds, often from palm or rice bran. Studies have looked at them, but evidence is still limited. |
| E306–E309 in ingredient lists | Tocopherols added as antioxidants to protect oils; usually present in small amounts. |
Examples from our shelves for some of the forms in the table above.
How much vitamin E: NRV, units and upper limit
- EU NRV: 12 mg a day (shown as mg alpha-TE, alpha-tocopherol equivalents).
- Common supplement amounts: 5–15 mg in multivitamins; 100–400 mg (about 150–600 IU) in single vitamin E products.
- Upper limit (EFSA): 300 mg a day of alpha-tocopherol for adults. EFSA has a review of this limit under way. UK guidance states that 540 mg (800 IU) or less a day from supplements is unlikely to cause harm.
Converting IU: 1 IU of natural vitamin E equals 0.67 mg; 1 IU of synthetic equals 0.45 mg. So 400 IU is about 268 mg if natural and 180 mg if synthetic. This is why the form matters when comparing products.
Rich food sources include wheat germ oil, sunflower and safflower oils, sunflower seeds, almonds, hazelnuts and peanuts, with smaller amounts in spinach, broccoli, kiwi and mango. Explore formulas containing vitamin E in our vitamins and minerals collection.
Who should check with a doctor or pharmacist first
- Anyone taking blood-thinning medicines (anticoagulants such as warfarin, or antiplatelet medicines): vitamin E supplements can increase the risk of bleeding.
- People due to have surgery or dental procedures: tell your care team about any high-dose vitamin E.
- People having chemotherapy or radiotherapy: antioxidant supplements could change how well these therapies work.
- People taking cholesterol-lowering medicines: in one study, an antioxidant mix including vitamin E reduced the effect of a statin-plus-niacin combination.
- Pregnancy and breastfeeding: amounts in pregnancy multivitamins are modest; ask before adding a high-strength product.
- Children: check the age on the pack and ask a doctor or pharmacist.
How to read a vitamin E label
- Check the prefix: "d-" means natural, "dl-" means synthetic.
- Look for mg alpha-TE: this already accounts for the form and is the fairest way to compare products.
- Convert IU if needed using 0.67 (natural) or 0.45 (synthetic).
- Read the %NRV: 12 mg is 100% NRV; a 268 mg capsule is over 2,000% NRV and close to the EFSA upper limit.
- Add up your products: vitamin E appears in multivitamins, beauty and hair formulas, omega-3 capsules and eye formulas.
Bahrain and GCC notes
Vitamin E softgels are oil-based and can become sticky or break down in high heat. Keep them below 25°C, away from sunny windows and parked cars. As a fat-soluble vitamin, it is commonly taken with a meal; during Ramadan, iftar is a practical time. Browse options in our vitamins and minerals collection.
Reading a real label
Sundance Vitamin E 400 IU 180 mg (400 IU), 100 Softgels| On the label | What it means |
|---|---|
| 180 mg (400 IU) | Two ways to state the same amount |
| dl-alpha tocopheryl acetate | The synthetic form; "dl" is the clue |
| 1500% NRV | 180 mg against the 12 mg reference intake |
| EFSA upper limit 300 mg a day | One softgel stays under it; count other sources |
- Vitamin E contributes to the protection of cells from oxidative stress
Applies to products that provide at least 15% of the NRV per daily portion (a 'source of' the nutrient).
Products with Vitamin E
Always read the label and check the amount per serving.
DAY2DAYDay2Day The Collagen Beauty Intense, 30 SachetsBHD26.730
Known NutritionKnown Nutrition Hair, Skin and Nails, 60 GummiesBHD15.000
Known NutritionKnown Nutrition Kids Vegan Multivitamin, 2 x 30 GummiesBHD12.600
Sundance VitaminsSundance Adult Multivitamin Gummies with Collagen, 50 GummiesBHD7.920Frequently asked questions
Is natural vitamin E better than synthetic?
Natural d-alpha-tocopherol is more potent per milligram, roughly twice the activity of synthetic dl-alpha-tocopherol. Comparing products by mg alpha-TE takes this into account.
How many mg is 400 IU of vitamin E?
About 268 mg if it is natural (d-alpha) and about 180 mg if it is synthetic (dl-alpha).
Can I take vitamin E with blood thinners?
Vitamin E supplements can increase the risk of bleeding with anticoagulant or antiplatelet medicines. Speak to your doctor or pharmacist before taking them together.
Do I need a vitamin E supplement?
Most people get enough vitamin E from nuts, seeds and vegetable oils. A doctor or dietitian can advise if your diet is very restricted.
