Fig. 2.

Glucose use by age and trade-offs with body weight growth rate (all males): (A) daily grams of glucose used by the brain, (B) brain glucose use as a fraction of RMR (upper line) and daily energy requirements (lower line), (C) sample z scores of %RMR to the brain (red) and body weight velocity (blue) by age, and (D) body weight velocity vs. %RMR to the brain (both sample z scores) showing linear trade-off between the two. Weight velocity and glucose uptake values are predicted at intervals of one-fifth of a year, with red numbers marking each birthday for reference. Reprinted from ref. 3.