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Nitrogen Balance at the Recommended Dietary Allowance for Protein in Minimally Active Male Vegans

Vegan diets have gained popularity in recent years for reasons including health benefits and concerns for animal welfare. Although these diets are considered to be nutritionally adequate, questions remain over whether the current protein recommendation (0.8 g/kg/d) is sufficient. Protein status is d...

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Autores principales: Bartholomae, Eric, Johnston, Carol S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10385755/
https://www.ncbi.nlm.nih.gov/pubmed/37513577
http://dx.doi.org/10.3390/nu15143159
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author Bartholomae, Eric
Johnston, Carol S.
author_facet Bartholomae, Eric
Johnston, Carol S.
author_sort Bartholomae, Eric
collection PubMed
description Vegan diets have gained popularity in recent years for reasons including health benefits and concerns for animal welfare. Although these diets are considered to be nutritionally adequate, questions remain over whether the current protein recommendation (0.8 g/kg/d) is sufficient. Protein status is determined through a nitrogen balance analysis when the protein content of the diet is known. A negative balance indicates a catabolic state, and a positive nitrogen balance indicates an anabolic state. In healthy adults, nitrogen equilibrium is the expectation reflecting the net synthesis and breakdown of proteins. Currently, there are no known studies measuring nitrogen balance in strict vegan men fed the protein requirement. Eighteen minimally active vegan men received a 5-day eucaloric diet (protein content: 0.8 g/kg/d). On day five, 24 h urine was collected for nitrogen analysis. Both the mean absolute nitrogen balance (−1.38 ± 1.22 g/d) and the mean relative nitrogen balance (−18.60 ± 16.96 mg/kg/d) were significantly lower than zero (equilibrium) (p < 0.001). There were no correlations seen between nitrogen balance and age, years as vegan, or fat-free mass. Consuming 0.8 g/kg/d of protein is not adequate to produce nitrogen balance in men adhering to typical strict vegan diets for at least one year.
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spelling pubmed-103857552023-07-30 Nitrogen Balance at the Recommended Dietary Allowance for Protein in Minimally Active Male Vegans Bartholomae, Eric Johnston, Carol S. Nutrients Article Vegan diets have gained popularity in recent years for reasons including health benefits and concerns for animal welfare. Although these diets are considered to be nutritionally adequate, questions remain over whether the current protein recommendation (0.8 g/kg/d) is sufficient. Protein status is determined through a nitrogen balance analysis when the protein content of the diet is known. A negative balance indicates a catabolic state, and a positive nitrogen balance indicates an anabolic state. In healthy adults, nitrogen equilibrium is the expectation reflecting the net synthesis and breakdown of proteins. Currently, there are no known studies measuring nitrogen balance in strict vegan men fed the protein requirement. Eighteen minimally active vegan men received a 5-day eucaloric diet (protein content: 0.8 g/kg/d). On day five, 24 h urine was collected for nitrogen analysis. Both the mean absolute nitrogen balance (−1.38 ± 1.22 g/d) and the mean relative nitrogen balance (−18.60 ± 16.96 mg/kg/d) were significantly lower than zero (equilibrium) (p < 0.001). There were no correlations seen between nitrogen balance and age, years as vegan, or fat-free mass. Consuming 0.8 g/kg/d of protein is not adequate to produce nitrogen balance in men adhering to typical strict vegan diets for at least one year. MDPI 2023-07-16 /pmc/articles/PMC10385755/ /pubmed/37513577 http://dx.doi.org/10.3390/nu15143159 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bartholomae, Eric
Johnston, Carol S.
Nitrogen Balance at the Recommended Dietary Allowance for Protein in Minimally Active Male Vegans
title Nitrogen Balance at the Recommended Dietary Allowance for Protein in Minimally Active Male Vegans
title_full Nitrogen Balance at the Recommended Dietary Allowance for Protein in Minimally Active Male Vegans
title_fullStr Nitrogen Balance at the Recommended Dietary Allowance for Protein in Minimally Active Male Vegans
title_full_unstemmed Nitrogen Balance at the Recommended Dietary Allowance for Protein in Minimally Active Male Vegans
title_short Nitrogen Balance at the Recommended Dietary Allowance for Protein in Minimally Active Male Vegans
title_sort nitrogen balance at the recommended dietary allowance for protein in minimally active male vegans
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10385755/
https://www.ncbi.nlm.nih.gov/pubmed/37513577
http://dx.doi.org/10.3390/nu15143159
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