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Details on health claims:

Huel meals and bars provide the right amount of protein, essential fats, carbohydrates, fiber, vitamins & minerals as part of a balanced diet

Energy Source of biotin to contribute to normal energy-yielding metabolism

Digestion Source of calcium to contribute to the normal function of digestive enzymes

Immune system Source of vitamin C to contribute to the normal function of the immune system

Skin health Source of zinc to contribute to the maintenance of normal skin

Cognitive function Source of iron to contribute to normal cognitive function

Muscle function Source of magnesium to contribute to normal muscle function

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Why Choline is an Essential Nutrient

Choline can be made by the body, more specifically the liver, but not in the amounts required, so we must get choline from the diet[1]. This makes choline an essential nutrient. Choline is commonly referred to as vitamin B4 but despite sharing similarities with the B vitamins it is neither a vitamin nor a mineral.

The US Institute of Medicine officially recognized choline as an essential nutrient in 1998[2]. It was determined that there was insufficient evidence to establish an estimated average requirement (EAR). As a result, adequate intakes (AI) of 550mg/day and 425mg/day were set for men and women respectively[2]. The AIs for pregnant women (450mg/day) and lactating women (550mg/day) are higher due to their increased needs and loss of choline through breast milk[3]. Similarly, the European Food Safety Authority (EFSA) established an AI of 400mg/day for adults with higher levels for pregnant and lactating women[4].

Interestingly, the UK does not recognize choline as an essential nutrient[5]. Consequently, choline is not included in UK dietary food bases or government recommendations and as such recent calls to the UK government have been made requesting the re-evaluation of their position[5].

Function

Choline has several important functions in the body. It serves as a source of methyl groups which are needed for numerous steps in metabolism[6]. Choline is required for making acetylcholine, a neurotransmitter, and phosphatidylcholine which is a vital component of cell membranes[7]. So, more simply, choline’s functions are involved in nerve transmissions, muscle movement and the structure of cells.

It’s vital during fetal development, namely the brain and spinal cord[8]. Inadequate intake can result in impaired memory function and neural tube defects[9].

As folate acts as a methyl donor, if a person’s folate intake is low then the requirement for choline increases to compensate[10]. Choline requirements are also affected by genetics, which is not taken into account by government recommendations[9].

Dietary Sources

Choline can be found in a wide variety of foods. The highest amounts are found in animal foods, particularly eggs, beef and salmon[7]. Choline can also be found in many plant foods, albeit at lower levels, such as soybeans, quinoa, nuts, cruciferous vegetables and whole grains[7].

It has been found that only 11% of US adults meet the AI[11] and the same is true for Europe[7]. As those on a plant-based diet consume foods with a lower amount of choline per serving it’s important that a balanced and varied diet is eaten to meet the AI.

Choline and NAFLD

Non-alcoholic fatty liver disease (NAFLD) is a disease associated with obesity[12]. It is characterized by an accumulation of fat in the liver which causes inflammation and can eventually lead to liver failure[13].

Choline is essential for lipid transport because it helps form the particles that are required for lipids to be carried in the blood[14]. Therefore, a lack of choline means less fat can be carried out of the liver which allows it to accumulate[15]. If food consumption is high, as is the case for those with obesity, then choline deficiency could exacerbate the problems that arise[16]. It’s still unclear the exact role of choline in NAFLD prevention and treatment but it’s an interesting area of development[15].

Neurological disorders

Due to the brain being home to an estimated 1 billion neurons[17] choline plays a major role in the brain’s proper functioning. So, choline has also been implicated in neurological diseases such as Alzheimer’s disease[18]. Alzheimer patients appear to have at least one negative alteration related to choline metabolism[19]. Furthermore, because of choline’s role in the structural integrity of cells, it’s been suggested it can slow cognitive decline in older adults[20]. However, clinical trials involving supplementation in this field are mixed[21, 22].

Why is Choline added to Huel?

Huel Powder and Huel Ready-to-drink contain 110mg of choline per 400kcal serving or 550mg per 2000kcal, in line with the higher US recommendation. Around 20% of the choline is provided by the main ingredients and the rest is added as part of the vitamin and mineral blend in the form of L-choline bitartrate. L-choline bitartrate is the preferred form approved for food fortification, mainly due to its higher absorption rate (REF).

As most people struggle to get enough choline in their diet, Huel is an easy way to ensure at least one meal contains an adequate amount of choline.

References

  1. Zeisel SH, et al. Choline: an essential nutrient for public health. Nutr Rev. 2009; 67(11):615-23.
  2. Institute of Medicine Standing Committee on the Scientific Evaluation of Dietary Reference I, et al. The National Academies Collection: Reports funded by National Institutes of Health. Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline. Washington (DC): National Academies Press (US)
  3. National Academy of Sciences.; 1998.
  4. NIH. Choline. Date Accessed: 18/10/19. [Available from: https://ods.od.nih.gov/factsheets/Choline-HealthProfessional/]
  5. Efsa Panel on Dietetic Products N, et al. Dietary Reference Values for choline. EFSA Journal. 2016; 14(8):e04484.
  6. Derbyshire E. Could we be overlooking a potential choline crisis in the United Kingdom? BMJ Nutrition, Prevention & Health. 2019:bmjnph-2019-000037.
  7. Zeisel S. Choline, Other Methyl-Donors and Epigenetics. Nutrients. 2017; 9(5):445.
  8. Wiedeman AM, et al. Dietary Choline Intake: Current State of Knowledge Across the Life Cycle. Nutrients. 2018; 10(10):1513.
  9. Sanders LM, et al. Choline: Dietary Requirements and Role in Brain Development. Nutr Today. 2007; 42(4):181-6.
  10. Zeisel SH. Choline: critical role during fetal development and dietary requirements in adults. Annu Rev Nutr. 2006; 26:229-50.
  11. Obeid R. The metabolic burden of methyl donor deficiency with focus on the betaine homocysteine methyltransferase pathway. Nutrients. 2013; 5(9):3481-95.
  12. Wallace TC, et al. Assessment of Total Choline Intakes in the United States. Journal of the American College of Nutrition. 2016; 35(2):108-12.
  13. Fabbrini E, et al. Obesity and nonalcoholic fatty liver disease: biochemical, metabolic, and clinical implications. Hepatology. 2010; 51(2):679-89.
  14. Carr RM, et al. Nonalcoholic Fatty Liver Disease: Pathophysiology and Management. Gastroenterol Clin North Am. 2016; 45(4):639-52.
  15. Canty DJ, et al. Lecithin and choline in human health and disease. Nutr Rev. 1994; 52(10):327-39.
  16. Corbin KD, et al. Choline metabolism provides novel insights into nonalcoholic fatty liver disease and its progression. Curr Opin Gastroenterol. 2012; 28(2):159-65.
  17. Zhu J, et al. The effects of choline on hepatic lipid metabolism, mitochondrial function and antioxidative status in human hepatic C3A cells exposed to excessive energy substrates. Nutrients. 2014; 6(7):2552-71.
  18. von Bartheld CS, et al. The search for true numbers of neurons and glial cells in the human brain: A review of 150 years of cell counting. J Comp Neurol. 2016; 524(18):3865-95.
  19. Michel V, et al. Choline transport for phospholipid synthesis. Exp Biol Med (Maywood). 2006; 231(5):490-504.
  20. Ziegler TR, et al. Modern nutrition in health and disease. Wolters Kluwer Health Adis: Philadelphia; 2012.
  21. Blusztajn JK, et al. Neuroprotective Actions of Dietary Choline. Nutrients. 2017; 9(8):815.
  22. De Jesus Moreno Moreno M. Cognitive improvement in mild to moderate Alzheimer's dementia after treatment with the acetylcholine precursor choline alfoscerate: a multicenter, double-blind, randomized, placebo-controlled trial. Clin Ther. 2003; 25(1):178-93.
  23. Higgins JP, et al. Lecithin for dementia and cognitive impairment. Cochrane Database Syst Rev. 2003; (3):Cd001015.

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