One (older) theory to support this is the Randle cycle [1], according to which, glucose and fatty acids can not be metabolized simultaneously. So, the presence

One (older) theory to support this is the Randle cycle [1], according to which, glucose and fatty acids can not be metabolized simultaneously. So, the presence of glucose will lead to any available fatty acids to be stored away. [1] https://en.wikipedia.org/wiki/Randle_cycle https://en.wikipedia.org/wiki/Randle_cycle