PMC 3328495
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When controlling for these relevant covariates, we observed significant effects of IF-P on seven metabolites (Figure 5B, Supplementary Table 4), which may be considered candidate markers of intermittent fasting: serine ( q = 0.003), TMAO ( q = 0.012), levulinic acid ( q = 0.017), 3-aminobutyric acid ( q = 0.029), citrate ( q = 0.033), isocitrate ( q = 0.033), and glucuronic acid ( q = 0.049)
These include, extreme tiredness, a lack of energy, pins and needles, muscle weakness, disturbed vision, mouth ulcers, a sore and red tongue, and cognitive or psychological concerns such as depression, confusion, and difficulty with memory, understanding or judgement
According to some studies, glutathione levels that are out of balance contribute to aging