Is pH a biochemical marker of IQ?

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Abstract
We have measured intracellular brain pH in vivo in 42 boys and found a significant correlation between this biochemical parameter and samples of intelligent behaviour. To the best of our knowledge this is the first reported relation between a biochemical marker which is within normal physiological values and intellectual ability. pH is one of the most accurate parameters that can be measured by $^{31}$P magnetic resonance spectroscopy and it reflects sensitively cellular ionic status and metabolic activity. The observed correlation, although not implying a causal relation, raises the possibility that intelligent behaviour may be influenced by the ionic status of brain tissue, or vice versa.