Choline: Effects, Requirements & Sources

A single egg yolk gives you more choline than many an expensive supplement cocktail – and yet hardly anyone has this nutrient on their radar. Choline is one of the very few substances on the supplement shelf for which the EU has several tested, authorised health claims. That makes it a nutrient you can talk about clearly and confidently.

Choline is an essential, vitamin-like nutrient that your body produces only to a limited extent itself and therefore takes in mainly through food. Authorised is: choline contributes to normal homocysteine metabolism, to normal lipid metabolism and to the maintenance of normal liver function. The best sources are egg yolk, liver, meat, fish as well as legumes and brassica vegetables; as a rough guide, around 400 mg per day applies for adults.

The key points at a glance

• Choline is an essential nutrient that the body produces itself only in small amounts.
• Authorised: choline contributes to normal homocysteine metabolism.
• Authorised: choline contributes to normal lipid metabolism.
• Authorised: choline contributes to the maintenance of normal liver function.
• Top sources: egg yolk, liver, meat, fish, legumes and brassica vegetables.

What choline is – and what it builds in the body

Choline is a water-soluble, vitamin-like compound. Your liver can produce small amounts itself, but it covers most of the requirement through food – which is why choline is considered essential today. Things get interesting when you look at what the body uses choline for. It is not a "single-purpose nutrient" but a versatile building block:

• Phosphatidylcholine (lecithin): a central component of every single cell membrane – that is, the envelope that holds your cells together.
• Acetylcholine: an important messenger substance (neurotransmitter) via which nerve cells pass on signals.
• Betaine: a substance that plays a part in metabolism, including in the conversion of homocysteine.

Choline thus sits at several fundamental switching points of metabolism at once. For three of these areas, the EU has authorised health claims after careful scientific review, which we may now use in their exact wording.

It is remarkable how "invisible" this nutrient is in everyday life. Because choline does not carry a classic vitamin name with a catchy letter, it hardly appears prominently on any nutrition table – even though it is involved in such fundamental building blocks as cell membranes and a central messenger substance. It is precisely this discrepancy between "important" and "little known" that makes choline a nutrient worth taking a conscious look at.

What choline demonstrably contributes to (authorised claims)

These claims refer to the contribution to normal bodily functions with adequate intake as part of a balanced diet – they are expressly not statements about healing or disease. Notable is the thematic proximity to the B vitamins: in homocysteine metabolism, folate, vitamin B6 and B12 also play a role, which is why choline and B vitamins are often mentioned in the same breath. More on this in B vitamins at a glance (B1–B12). In the case of persistent complaints relating to the liver, the rule is: please have this clarified by a doctor; our article Supporting the liver naturally provides additional guidance.

How much choline do you need?

There is no classic reference value for choline as there is for many vitamins, but there is a guiding value. The European Food Safety Authority (EFSA) has derived a so-called adequate intake (AI) for adults:

• Adults: as a guide, around 400 mg of choline per day (EFSA reference value).
• Pregnancy and breastfeeding: a higher value is stated here, because the requirement rises.

Individual requirements depend on age, sex and stage of life. Choline can be well covered through a mixed diet with eggs, meat and legumes. In sensitive phases such as pregnancy and breastfeeding, or in the case of existing illnesses, any targeted additional intake should be supervised by a doctor – for which Nutrients when trying to conceive and during pregnancy is a good fit.

Who should pay particular attention to choline

Not everyone needs to think about choline – but a few groups benefit from a conscious look at their intake:

• People on a purely plant-based diet: with eggs and meat, the two richest sources fall away. Soybeans, other legumes and brassica vegetables then become the most important suppliers.
• Pregnant and breastfeeding women: the requirement rises here, which is why a higher guideline value is stated – any targeted intake should be supervised by a doctor.
• Anyone who eats little variety: those who rarely have eggs, fish or legumes on their plate tend to take in less choline.

For everyone else, the following applies: with a mixed diet that includes eggs regularly, supply is usually straightforward. Choline is therefore less a "supplement for everyone" than a nutrient you should know about and pay targeted attention to when needed.

Choline-rich foods

The egg yolk is the secret champion – it holds practically all of the egg's choline. Anyone eating an entirely plant-based diet does not have one of the richest sources on their plate once eggs and meat fall away. In that case, soybeans and other legumes as well as brassica vegetables become the most important choline suppliers, and a conscious look at intake is worthwhile. You will find concrete tips on this in Nutrients for vegans.

What research is investigating

Choline has been intensively studied scientifically, and part of that has long been textbook knowledge: that it is found in every cell membrane as a building block of phosphatidylcholine and serves as a precursor of the messenger substance acetylcholine is among the established fundamentals of biochemistry. It is precisely on this solid basis that the three authorised EU claims also rest.

Beyond that, research looks at choline's role in special stages of life – such as the increased requirement in pregnancy and breastfeeding – and at the question of how well various population groups are actually supplied. These questions continue to be worked on. What can be used with certainty are the authorised claims above; we deliberately do not derive any promises of effect beyond them.

Which forms are found in supplements

In food supplements, choline occurs in various chemical compounds that differ in their pure choline content. Common ones are choline bitartrate and choline citrate; alongside these there are more specialised forms such as alpha-GPC (L-alpha-glycerylphosphorylcholine) and citicoline (CDP-choline). These forms deliver differing amounts of pure choline per gram. It is therefore worth taking a look at the stated choline content per serving – why the form matters for absorption is explained in Bioavailability simply explained.

Choline is also found in many combination products – often together with B vitamins, which thematically contribute to homocysteine metabolism. Whether such a combination product or a single-substance product is more worthwhile for you is put into context by Single-substance product or complex?

Recognising quality

• Form and choline content: the compound and the pure choline content per serving should be clearly declared.
• Traceable amount: a transparently stated content instead of vague figures.
• Purity: lab-tested, without unnecessary additives.
• Sensible combinations: for example with B vitamins, which contribute to homocysteine metabolism.

As a German manufacturer with laboratory testing, Scheunengut places value on clear declaration and tested raw materials.

Honestly put into context

Choline is one of those cases where you may be confident: its role as an essential nutrient is textbook knowledge, and for three areas there are tested EU claims. At the same time: these claims concern normal bodily functions and are not promises that go beyond the authorised wording. Anyone who eats a mixed diet and regularly eats eggs is usually well supplied; a targeted intake becomes interesting above all with a purely plant-based diet or in special stages of life – then ideally with medical supervision.

Matching products from Scheunengut

You will find choline supplements in the Choline category. Because choline and certain B vitamins are involved in homocysteine metabolism, the guide B vitamins at a glance (B1–B12) fits excellently with it; where the liver is concerned, Supporting the liver naturally is worthwhile. A broader overview is given by the guides Nutrients for vegans and Nutrients for the energy metabolism as well as the category Vitamins, minerals & trace elements.

Frequently asked questions (FAQ)

Which health claims are authorised for choline?

Three: choline contributes to normal homocysteine metabolism, it contributes to normal lipid metabolism and it contributes to the maintenance of normal liver function. These claims refer to normal bodily functions and are not statements about healing.

How much choline per day is sensible?

As a guide, EFSA states an adequate intake of around 400 mg per day for adults. In pregnancy and breastfeeding the value is higher. Choline can usually be well covered through a mixed diet with eggs, meat and legumes.

Which foods contain the most choline?

At the top are egg yolk as well as liver and offal, followed by meat and fish. On the plant side, it is above all soybeans and other legumes as well as brassica vegetables such as broccoli and cauliflower that supply choline. With a purely plant-based diet, a conscious look at these sources is worthwhile.

What is the difference between the choline forms?

Compounds such as choline bitartrate and choline citrate as well as more specialised forms such as alpha-GPC and citicoline differ in their pure choline content per gram. When comparing, it is therefore worth looking at the stated choline content per serving, not just the total amount of the compound.