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O. Kajimoto, H. Saigusa, M. Hiramitsu, K. Sakaida and T. Yasuda, “The Internet Investigation about the Attenuation of Fatigue Feeling by Taking Containing Lemon Citric Acid,” Japan Society of Clinical Trials and Research, Vol. 35, No. 7, 2007, pp. 821-828.

has been cited by the following article:

• TITLE: Effects of Dietary Citric Acid on Metabolic Indicators and Gene Expression in the Skeletal Muscles of Fasted Mice

  AUTHORS: Yurie Hara, Nakamichi Watanabe

  KEYWORDS: Citric Acid; Fatigue; Gluconeogenesis; DNA Microarray; TCA Cycle

  JOURNAL NAME: Food and Nutrition Sciences, Vol.4 No.11, October 8, 2013

  ABSTRACT: Citric acid is recognized and utilized as a dietary supplement for its ability to eliminate fatigue. However, the molecular and cellular mechanism underlying this effect has not been elucidated. This study investigated the effect of intragastric citric acid administration on the energy metabolism and gene expression in the skeletal muscles of mice that had been fasted without exercise, using biochemical analyses of metabolic indicators and DNA microarrays. Expression of the genes involved in the glycolysis, tricarboxylic acid cycle and β-oxidation of fatty acids were not affected by citric acid administration. However, citric acid increased the level of blood glucose and expression of the phosphoenolpyruvate carboxykinase gene. These results indicate that citric acid ingestion may eliminate fatigue by promoting gluconeogenesis.