Metabolic disorders such as diabetes and obesity are serious global health issues. These diseases are accelerated by mineral deficiencies, emphasizing the importance of addressing these deficiencies in disease management plans. Lactate metabolism is fundamentally linked to glucose metabolism, and several clinical studies have reported that blood lactate levels are higher in obese and diabetic patients than in healthy subjects. Balanced deep-sea water contains various minerals and exhibits antiobesity and antidiabetic activities in mice; however, the impact of balanced deep-sea water on lactate metabolism is unclear. Thus, we evaluated the effects of balanced deep-sea water on lactate metabolism in C2C12 myotubes, and found that balanced deep-sea water mediated lactate metabolism by regulating the gene expression levels of lactate dehydrogenases A and B, a monocarboxylate transporter, and a mitochondrial pyruvate carrier. The activities of peroxisome proliferator-activated receptor gamma coactivator-1α (PGC-1α) and signaling molecules involved in PGC-1α activation were also upregulated by treatment with balanced deep-sea water. These results suggest that balanced deep-sea water, which can mediate lactate metabolism, may be used to prevent or treat obesity and diabetes mellitus.
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