Cited by 21Nutrition and Health in AgingMuscle metabolism and nutritionMuscle Physiology and Disorders

l-Arginine and Beetroot Extract Supplementation in the Prevention of Sarcopenia

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Córdova-Martínez, Alfredo, Caballero-García, Alberto, Bello, Hugo J., Pons-Biescas, Antoni, Noriega, David C., Roche, Enrique·2022·Pharmaceuticals

Abstract

Aging is associated with a significant decline in neuromuscular function, leading to a reduction in muscle mass and strength. The aim of the present report was to evaluate the effect of supplementation with nitric oxide precursors (l-arginine and beetroot extract) in muscular function during a training period of 6 weeks in elderly men and women. The study (double-blind, placebo-controlled) involved 66 subjects randomly divided into three groups: placebo, arginine-supplemented and beetroot extract-supplemented. At the end of this period, no changes in anthropometric parameters were observed. Regarding other circulating parameters, urea levels were significantly (p < 0.05) lower in women of the beetroot-supplemented group (31.6 ± 5.9 mg/dL) compared to placebo (41.3 ± 8.5 mg/dL) after 6 weeks of training. In addition, the circulating creatine kinase activity, as an index of muscle functionality, was significantly (p < 0.05) higher in women of the arginine- (214.1 ± 162.2 mIU/L) compared to the beetroot-supplemented group (84.4 ± 36.8 mIU/L) at the end of intervention. No significant effects were noticed with l-arginine or beetroot extract supplementation regarding strength, endurance and SPPB index. Only beetroot extract supplementation improved physical fitness significantly (p < 0.05) in the sprint exercise in men after 6 weeks (2.33 ± 0.59 s) compared to the baseline (2.72 ± 0.41 s). In conclusion, beetroot seems to be more efficient during short-term training while supplementing, preserving muscle functionality in women (decreased levels of circulating creatine kinase) and with modest effects in men.

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  • Dietary nitrate increases NO bioavailability via the nitrate-nitrite-NO pathway, particularly in conditions of hypoxia or high metabolic demand characteristic of ageing muscle.

    “Dietary nitrate, which is found in high concentrations in vegetables such as beetroot, increases NO bioavailability via the nitrate-nitrite-NO pathway, particularly in conditions of hypoxia or high metabolic demand, which are characteristic of ageing muscle [41,59,185,186].”

    From Dietary Nitrate-Rich Vegetables as Natural Modulators of Health: Mechanisms and Benefits in Ageing Populations (2026) · cites this paper as [186]

    The Introduction (page not provided) describes dietary nitrate as a nitric-oxide precursor, and the Discussion (page not provided) describes NO production through nitrate–nitrite intake from beetroot. Neither passage says this pathway is particularly active under hypoxia or high metabolic demand, or that those conditions characterize ageing muscle. (LLM, conf=0.86)

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Authors
Córdova-Martínez, A., Caballero-García, A., Bello, H. J., Pons-Biescas, A., Noriega, D. C., & Roche, E.
Affiliations
  • Biochemistry, Molecular Biology and Physiology, Faculty of Health Sciences, GIR Physical Exercise and Aging, University of Valladolid, Campus Duques de Soria, 42004 Soria, Spain
  • Universidad de Valladolid (ES)
  • Research Group on Community Nutrition and Oxidative Stress, University of Balearic Islands, 07122 Palma de Mallorca, Balearic Islands, Spain
  • Hospital Clínico Universitario de Valladolid (ES)
Corresponding author
Roche, Enrique
Venue
Pharmaceuticals
Publisher
MDPI AG
Published
2022-02-26
Volume
15
Issue
3
Pages
290
ISSN
1424-8247 (ISSN-L)
OpenAlex
W4214772010
Cited by
21
References
61
Citations by year
2026: 4 · 2025: 3 · 2024: 7 · 2023: 5 · 2022: 2
FWCI
2.63
Type
journal article
Language
en
Open access
Locations
  • Pharmaceuticals (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Hispana (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • UVaDOC UVaDOC University of Valladolid Documentary Repository (University of Valladolid) (submittedVersion, cc-by)
Funders
  • Centro de Investigación Biomédica en Red-Fisiopatología de la Obesidad y Nutrición
  • Instituto de Salud Carlos III
  • European Regional Development Fund
Topics
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
L-arginine, beetroot extract, sarcopenia prevention, nitric oxide precursor, aging, muscle strength, muscular endurance, creatine kinase, urea, physical fitness, sex differences, elderly men and women, short-term training

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