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Vitamin B12 is a key vitamin for mood, energy, nervous system function, and more

Previous studies in our lab have shown the accuracy of DEXA for body composition to be 3.8% as assessed by direct comparison with hydrodensitometry and scale weight

GH mediates its functions directly through its receptor (GHR) or indirectly via insulin-like growth factor 1 (IGF1) (Yang et al., 2008)

More recent studies have revealed a specific amino acid and polyamine transporter that's extremely selective for NMN and allows it to enter a cell without first becoming NR.7 Concentrations of this transporter in the guts of mice appear to increase with age, suggesting that the body tries to get extra NMN from its food supply to compensate for deteriorating levels of NAD+ that coincide with aging