Pardridge and his colleagues wondered if they could slip therapeutic compounds into the brain with the help of insulin and transferrin, a molecule that moves iron from place to place; both insulin and transferrin are granted free passage across the blood - brain barrier. (discovermagazine.com)
But before glucose can be tapped, it must be ushered into cells with the help of insulin, a hormone produced in the pancreas. (discovermagazine.com)
All carbohydrates are ultimately broken down into glucose, which circulates in blood before entering the cells with the help of insulin, where it's used as fuel, while the excess gets stored as fat. (fitnessandpower.com)