Xanthinol
Xanthinol is a very potent water-soluble derivative of niacin that can be found in diet supplements. It is also known as xanthinol nicotinate. Xaninthol is known to be a potent vasodilator that can easily pass through the cell membrane and once inside the cell it causes an increase in glucose metabolism resulting in an increased energy. It was approved as a drug in 1998 in Canada and nowadays its status is cancelled post marketing.