Choline: The essential nutrient that hardly anyone talks about and that almost everyone is deficient in

Choline: The essential nutrient that hardly anyone talks about and that almost everyone is deficient in

 

There are certain nutrients that are firmly embedded in the collective consciousness: vitamin C, vitamin D, magnesium, omega-3. And then there is choline. Although it is essential for the functioning of virtually every cell in the human body, very few people are aware of it. Yet recent studies suggest that a large proportion of the population in Europe consistently consumes too little of it. This includes, in particular, women, pregnant women and people who follow a predominantly plant-based diet. This article explains what choline is, why it is so important and what this means for your diet.

What exactly is choline?

Choline is a water-soluble, nitrogen-containing compound that the body can synthesise in small amounts, but not in sufficient quantities to meet its needs. It is therefore considered an essential nutrient that must be obtained from the diet. The body uses choline primarily to produce phosphatidylcholine, one of the most important phospholipids in cell membranes, and to synthesise the neurotransmitter acetylcholine, which is essential for memory, muscle control and attention.

Furthermore, choline plays a central role in what is known as the one-carbon cycle, a complex biochemical network that is closely linked, amongst other things, to folate and vitamin B12 metabolism. Anyone who has studied folate should therefore be familiar with choline as the often-overlooked partner in the same system.

The role of choline in the brain

The neurotransmitter acetylcholine is produced exclusively from choline. It plays a role in almost all cognitive processes: learning, memory formation, concentration and the regulation of the sleep-wake cycle. A long-term deficiency can significantly impair cognitive function and has been linked in research to an increased risk of neurodegenerative diseases.

The role of choline in early brain development is particularly interesting. Various studies show that an adequate supply of choline during pregnancy has a positive effect on a child’s neural development, including by promoting neurogenesis and supporting the formation of connections between nerve cells. This is particularly true during the third trimester and in the first few months of life, when the child’s brain grows most rapidly.

What choline has to do with your liver

There is a lesser-known but extremely important link between choline and liver health. The liver needs choline to package fats as lipoproteins and transport them into the bloodstream. If there is a lack of choline, fats cannot be removed and accumulate in the liver. Clinically, this is referred to as hepatic steatosis, or fatty liver.

In its scientific opinion, the European Food Safety Authority (EFSA) has explicitly pointed out that a choline deficiency can lead to fatty liver and liver damage. This is not a rare or marginal phenomenon: non-alcoholic fatty liver disease is now one of the most common liver diseases in Europe, and insufficient choline intake is one of the underestimated risk factors.

Who is particularly at risk?

The figures are sobering. A European analysis based on the EFSA database showed that the average choline intake among large sections of the European population is below the recommended level. A study carried out in Germany involving 283 pregnant women found that only 7 per cent of the participants met the recommended choline intake for pregnant women.

Another study examining vegan and vegetarian diets found that 95 per cent of vegans and vegetarians, as well as 93 per cent of omnivores, did not consume sufficient amounts of choline. The picture is therefore clear: it is not just groups with restricted diets that are affected, but the general population as a whole.

The groups at highest risk include:

Pregnant and breastfeeding women, as their requirements increase significantly during this period (to between 480 and 650 mg per day, according to various recommendations), Post-menopausal women, as oestrogen stimulates the body’s own choline synthesis and this protective effect ceases after the menopause; people who follow a predominantly plant-based diet, as choline is found in significant quantities primarily in animal-based foods; and people with certain genetic variants in the PEMT gene that limit the body’s own choline synthesis.

How much choline do we need?

The EFSA has set a reference intake of 400 mg per day for adults. By contrast, the US Institute of Medicine recommends 550 mg for men and 425 mg for women. Various guidelines recommend between 480 and 650 mg per day for pregnant women, and up to 700 mg for breastfeeding women.

An important point to note: unlike vitamins such as D or B12, there is no official recommended intake for choline in most European countries in the sense of a binding reference value. Choline rarely appears on nutrition labels, is seldom discussed in dietary advice, and many commercially available multivitamin supplements contain none at all or only trace amounts. This makes the supply situation even more problematic.

Where can you find choline?

By far the richest source of choline in the human diet is beef liver. Depending on the source, it provides between 350 and 430 mg of choline per 100 grams, which is almost the entire recommended daily intake on its own. This is no coincidence: the liver is the body’s central metabolic organ and processes enormous amounts of choline every day.

Other good animal sources include eggs (particularly the yolk, which contains around 150 mg per egg), chicken liver, beef, salmon and other seafood. Plant-based sources such as soya beans, broccoli or lentils do contain choline, but in significantly smaller amounts and often in a form that is less easily absorbed. To meet the daily requirement through plant-based foods alone, disproportionately large portions would be necessary.

Choline and folate: two sides of the same coin

Anyone familiar with our article on folate will recognise an important parallel. Choline and folate are closely linked: both are components of the same methylation pathway and can, to a certain extent, complement one another. If folate intake is insufficient, the need for choline increases, and vice versa. This means that anyone ensuring a good supply of folate should not forget choline, and anyone keeping an eye on their choline intake will benefit from sufficient folate.

This link is particularly relevant for pregnant women. Together, these two nutrients support normal cell division, the development of the nervous system and the formation of the neural tube. It is therefore very important to ensure an adequate intake of both nutrients before and during pregnancy.

Conclusion

Choline is no exotic nutrient to nutrition experts. It is a fundamental building block for the brain, liver, cell membranes and hormone metabolism, and a significant proportion of the population consistently consumes too little of it. The solution is not complicated: foods of animal origin, particularly liver and eggs, are the most effective sources of choline that nature has to offer. Anyone wishing to ensure an adequate intake should regularly include these foods in their diet or consider targeted supplementation. As always, if you have any concerns or specific health conditions, it is advisable to consult a doctor.

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