Intravenous nicotinamide riboside elevates mouse skeletal muscle NAD+ without impacting respiratory capacity or insulin sensitivity
Summary: In clinical trials, oral supplementation with nicotinamide riboside (NR) fails to increase muscle mitochondrial respiratory capacity and insulin sensitivity but also does not increase muscle NAD+ levels.This study tests the feasibility of chronically elevating skeletal muscle NAD+ in mice and investigates the tiny gum squares putative effe