Mapping Age Differences in Brain Energy Metabolites and Metabolic Markers of Cellular Membrane Production and Degradation With <sup>31</sup>P Magnetic Resonance Spectroscopy.

Among adults, no age‐related differences in gray and white matter tissue fractions were noted anywhere except the VC, in which there was a negligible association with age until a negative trend in older participants emerged after the age of 65 years, as reflected in a significant quadratic component. 4.

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