Instead of being ground in evidence, the plant-based and vegan diet fads could worsen an already low intake of an essential nutrient involved in brain health. And governments which spend time creating panic about salt and sugar fail to monitor dietary levels of this vital nutrient--choline--found predominantly in meat and eggs.
Choline is an essential dietary nutrient, but the amount produced by the liver is not enough to meet the requirements of the human body. It is critical to brain health, particularly during fetal development. It also influences liver function, with shortfalls linked to irregularities in blood fat metabolism as well as excess free radical cellular damage. The primary sources of dietary choline are beef, eggs, dairy products, fish, and chicken, though much lower levels are in nuts, beans, and cruciferous vegetables, such as broccoli.
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In 1998, recognizing the importance of choline, the US Institute of Medicine recommended minimum daily intakes. These range from 425 mg/day for women to 550 mg/day for men, and 450 mg/day and 550 mg/day for pregnant and breastfeeding women, respectively, because of the critical role the nutrient has in fetal development. In 2016, the European Food Safety Authority published similar daily requirements. Yet national dietary surveys in North America, Australia, and Europe show that habitual choline intake, on average, falls short of these recommendations.
"This is....concerning given that current trends appear to be towards meat reduction and plant-based diets," says Dr. Emma Derbyshire, of Nutritional Insight, a consultancy specializing in nutrition and biomedical science. She commends the first report (EAT-Lancet) to compile a healthy food plan based on promoting environmental sustainability, but suggests that the restricted intakes of whole milk, eggs and animal protein it recommends could affect choline intake.
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And she is at a loss to understand why choline does not feature in UK dietary guidance or national population monitoring data.
"Given the important physiological roles of choline and authorization of certain health claims, it is questionable why choline has been overlooked for so long in the UK," she writes. "Choline is presently excluded from UK food composition databases, major dietary surveys, and dietary guidelines," she adds.
It may be time for the UK government's independent Scientific Advisory Committee on Nutrition to reverse this, she suggests, particularly given the mounting evidence on the importance of choline to human health and growing concerns about the sustainability of the planet's food production.
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"More needs to be done to educate healthcare professionals and consumers about the importance of a choline-rich diet, and how to achieve this," she writes. "If choline is not obtained in the levels needed from dietary sources per se then supplementation strategies will be required, especially in relation to key stages of the life cycle, such as pregnancy, when choline intakes are critical to infant development," she concludes.
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