Vitamin E: the fat-soluble antioxidant

When butter goes rancid or a sliced apple turns brown, you're seeing oxidation in action – oxygen attacks fats and cells. It's precisely against this kind of attack that vitamin E protects the fatty parts of your cells. It is the most important fat-soluble radical scavenger your body has, and it sits where water-soluble protectors such as vitamin C can't reach: right in the middle of the cell membranes.

Short and to the point: vitamin E contributes to the protection of cells from oxidative stress – that is the approved claim. It is a fat-soluble antioxidant that protects cell membranes above all. The natural form (RRR-alpha-tocopherol) is utilised better than the synthetic one, and as a team with vitamin C the two complement each other.

The most important points in brief

• Vitamin E contributes to the protection of cells from oxidative stress (approved EU claim).
• It is a fat-soluble antioxidant and protects the cell membranes above all.
• The natural form (RRR-alpha-tocopherol) is absorbed better than the synthetic one.
• Vitamin E and vitamin C work hand in hand as antioxidants.

What vitamin E does in the body

An image helps to understand vitamin E: your cell membranes consist of fat-like molecules lying tightly packed like shingles. Free radicals can attack these fats and trigger a chain reaction – one molecule dragging the next along. Vitamin E sits right in the middle of these membranes and catches the first radical before the chain gets going. It sacrifices itself, so to speak, so that the membrane stays intact.

Because it is fat-soluble, vitamin E can work precisely where water-soluble antioxidants can't reach – in the fatty building blocks of the cell. The approved claim accordingly is that vitamin E contributes to the protection of cells from oxidative stress. What oxidative stress actually is is explained by the guide Free radicals & oxidative stress.

Why "oxidative stress" isn't a marketing word

The term oxidative stress sounds like label prose, but it describes a very real process. During normal metabolism – especially during energy production in the cells – reactive oxygen compounds, the free radicals, are constantly being formed. In moderation they are even useful, for example for immune defence. It becomes problematic when their number gets out of hand and the body's own protective system can no longer keep up. Then they can attack fats, proteins and genetic material. Vitamin E is one of the brakes in this system – specifically for the fatty membranes. The interplay of the various protective factors is described in more detail by the guide What are antioxidants?.

Tocopherols and tocotrienols – vitamin E is a family

Strictly speaking, "vitamin E" is not a single substance at all, but a family of eight related compounds: four tocopherols and four tocotrienols. The most active and best studied is alpha-tocopherol – which is why the nutrient requirement usually refers to it. Good products clearly state the form contained, rather than just naming "vitamin E" non-specifically.

Natural or synthetic – a real difference

With hardly any vitamin is the difference between the natural and synthetic form as relevant as here:

The reason: the synthetic variant is a mixture of eight mirror-image forms, of which the body uses only some optimally. So a look at the label "RRR" (natural) versus "all-rac" (synthetic) is worthwhile – details in the guide Synthetic or natural vitamins.

What research is investigating

Textbook-solid is the role of vitamin E as a fat-soluble radical scavenger in the cell membranes – that is the biochemical core of the approved claim and well understood. Beyond that, research is interested in how the network of antioxidants interacts: vitamin E, vitamin C, glutathione and other substances "pass" electrons to each other, so to speak, and regenerate one another. Research is also investigating what role the lesser-known family members – the tocotrienols – play in tissue; here research is still at the beginning. For everyday understanding it's enough: a good supply of vitamin E maintains membrane protection, extreme high dosing brings no linear additional benefit.

The team with vitamin C

Antioxidants rarely work alone. When vitamin E has caught a radical, it is itself briefly "used up" – and here vitamin C comes into play: it helps to bring vitamin E back into its active form. One is fat-soluble (in the membrane), the other water-soluble (in the cell water) – together they cover both worlds. More on this in the guide Vitamin C: effects & daily requirement. Whether you should take both together is clarified by Omega-3 and vitamin E together. Further cell protectors are covered by the guides on OPC and Astaxanthin.

In practice: requirement, timing and combinations

The DGE's estimated value is around 12–15 mg per day. Since vitamin E is fat-soluble, it's best to take it with a meal containing fat – then it is absorbed optimally. One point for people who supplement a lot of omega-3: plenty of polyunsaturated fatty acids increase the need for radical scavengers, because it is precisely these fats that are sensitive to oxidation – one reason why vitamin E often comes up near omega-3 topics. For an overview of all antioxidants, the guide Antioxidants at a glance is worth a look.

Who it's worth looking at vitamin E for

A few constellations make vitamin E more interesting than usual. Anyone who supplements a lot of omega-3 has more oxidation-sensitive fatty acids in the body – one reason why good omega-3 oils often naturally contain vitamin E and why the topic belongs together here (more under Recognising omega-3 quality). Anyone who eats a very low-fat diet tends to absorb fewer fat-soluble vitamins. And for anyone generally interested in antioxidants and cell protection, vitamin E is one of the cornerstones. For most people, a good supply through food is enough – a supplement is the addition, not the replacement.

Quality: what you can watch out for

When buying, it's worth looking above all at the form: RRR-alpha-tocopherol stands for the natural variant, all-rac- or dl- for the synthetic one. High-quality products declare this clearly and state the amount in mg. Some preparations contain a "mixed tocopherol" profile that provides other tocopherols besides alpha – this comes closer to the natural composition in foods. Because vitamin E is sensitive to light, dark capsules or brown glass are a good sign. The basics of assessing a product are covered in the guide Lab-tested – what does that mean?.

Food sources

Vitamin E is found above all in vegetable oils (wheat germ, sunflower and safflower oil), in nuts (almonds, hazelnuts) and in seeds (sunflower seeds). Even a handful of almonds or a spoonful of good oil over the salad provides a decent portion. Because it is sensitive to heat and light: store cold-pressed oils cool and dark and don't heat them strongly.

Honestly put into context

Vitamin E is a reliable, well-studied cell protector with a clearly approved function. What it isn't: an anti-ageing miracle cure that achieves more in high doses than in a normal amount. The benefit lies in a solid supply – best through nuts, seeds and good oils, supplemented by the natural form if you supplement. Anyone who watches for the label "RRR" gets the most out of it.

Matching products from Scheunengut

You'll find vitamin E products in the Vitamin E category. Matching antioxidant partners are available under Vitamin C, OPC and Astaxanthin. Further reading: Free radicals & oxidative stress, Antioxidants at a glance, Vitamin C, Natural vs. synthetic vitamins and the overview All 13 vitamins.

Frequently asked questions (FAQ)

What does vitamin E do in the body?

Vitamin E is a fat-soluble antioxidant. It contributes to the protection of cells from oxidative stress by catching free radicals in the cell membranes before they trigger a chain reaction. In this way it protects especially the fatty components of the cell.

Which is better – natural or synthetic vitamin E?

The natural form (RRR-alpha-tocopherol) is absorbed better by the body and retained longer than the synthetic one (all-rac- or dl-alpha-tocopherol). A look at the label is worthwhile: RRR stands for natural, all-rac for synthetic.

How much vitamin E do you need a day?

The DGE's estimated value is around 12 to 15 mg per day. This can be well covered through nuts, seeds and vegetable oils. Since vitamin E is fat-soluble, it is best absorbed with a meal containing fat.

Why are vitamin E and vitamin C often mentioned together?

The two complement each other: after vitamin E has caught a radical, vitamin C helps to bring it back into the active form. Vitamin E works in the fat-soluble area of the membrane, vitamin C in the cell water – together they cover both worlds.