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The age-related decline in neuromodulators, neurotransmitters, and glutathione levels may account for the diminished cognitive benefits of caffeine and paraxanthine in older animals
Panjwani et al., 2013)
These usually contain hydroxocobalamin or cyanocobalamin
however, the only statistically significant difference was between the LD control group and both groups switched from WD to LD, regardless of their treatment (Supplementary Fig
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