The acute postprandial response of homocysteine to multivitamin and mineral supplementation with a standard meal is not impaired in older compared to younger adults.

Autor: Gillies NA; Liggins Institute, The University of Auckland, 85 Park Road, Grafton, Private Bag 92019, Auckland, 1142, New Zealand.; The Riddet Institute, Palmerston North, New Zealand., Sharma P; Liggins Institute, The University of Auckland, 85 Park Road, Grafton, Private Bag 92019, Auckland, 1142, New Zealand.; The Riddet Institute, Palmerston North, New Zealand., Han SM; Liggins Institute, The University of Auckland, 85 Park Road, Grafton, Private Bag 92019, Auckland, 1142, New Zealand., Teh R; School of Population Health, The University of Auckland, Auckland, New Zealand., Fraser K; The Riddet Institute, Palmerston North, New Zealand.; The High-Value Nutrition National Science Challenge, Auckland, New Zealand.; Grasslands Research Centre, AgResearch Ltd, Palmerston North, New Zealand., Roy NC; Liggins Institute, The University of Auckland, 85 Park Road, Grafton, Private Bag 92019, Auckland, 1142, New Zealand.; The Riddet Institute, Palmerston North, New Zealand.; The High-Value Nutrition National Science Challenge, Auckland, New Zealand.; Department of Human Nutrition, The University of Otago, Dunedin, New Zealand., Cameron-Smith D; Liggins Institute, The University of Auckland, 85 Park Road, Grafton, Private Bag 92019, Auckland, 1142, New Zealand.; The Riddet Institute, Palmerston North, New Zealand.; College of Engineering, Science and Environment, The University of Newcastle, Callaghan, Australia.; College of Health, Medicine, and Wellbeing, The University of Newcastle, Callaghan, Australia., Milan AM; Liggins Institute, The University of Auckland, 85 Park Road, Grafton, Private Bag 92019, Auckland, 1142, New Zealand. a.milan@auckland.ac.nz.; The High-Value Nutrition National Science Challenge, Auckland, New Zealand. a.milan@auckland.ac.nz.; Grasslands Research Centre, AgResearch Ltd, Palmerston North, New Zealand. a.milan@auckland.ac.nz.
Jazyk: angličtina
Zdroj: European journal of nutrition [Eur J Nutr] 2023 Apr; Vol. 62 (3), pp. 1309-1322. Date of Electronic Publication: 2022 Dec 20.
DOI: 10.1007/s00394-022-03068-7
Abstrakt: Purpose: B vitamins are required for the complex regulation of homocysteine and one-carbon (1C) metabolism. Nutritional supplements are frequently used by older adults to counter nutritional inadequacies. However, the postprandial use of B vitamins from supplements in 1C metabolism may be altered with age owing to impaired nutrient absorption and metabolic regulation. Despite implications for health and nutritional status, postprandial 1C metabolite responses have not been characterised in older adults.
Methods: Healthy older (n = 20, 65-76 years) and younger (n = 20, 19-30 years) participants were recruited through online and printed advertisements in Auckland, New Zealand. Participants consumed a multivitamin and mineral supplement with a standard breakfast meal. Blood samples were collected at baseline and hourly for 4 h following ingestion. Plasma 1C metabolites (betaine, choline, cysteine, dimethylglycine, glycine, methionine, serine) were quantified using liquid chromatography coupled with mass spectrometry. Serum homocysteine, folate and vitamin B 12 were quantified on a Cobas e411 autoanalyzer.
Results: Older adults had higher fasting homocysteine concentrations (older: 14.0 ± 2.9 µmol/L; younger: 12.2 ± 2.5 µmol/L; p = 0.036) despite higher folate (older: 36.7 ± 17.4 nmol/L; younger: 21.6 ± 7.6 nmol/L; p < 0.001) and similar vitamin B 12 concentrations (p = 0.143) to younger adults. However, a similar postprandial decline in homocysteine was found in older and younger subjects in response to the combined meal and supplement. Except for a faster decline of cystathionine in older adults (p = 0.003), the postprandial response of other 1C metabolites was similar between young and older adults.
Conclusion: Healthy older adults appear to maintain postprandial responsiveness of 1C metabolism to younger adults, supported by a similar postprandial decline in homocysteine concentrations.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany.)
Databáze: MEDLINE
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