Consisting of at least 60% fat, the human brain is the fattest organ in the whole body.
What’s more, the fat contained in the brain cannot be metabolised for energy. The brain does not contain “fat cells”, such as those in our belly that mercifully shrink when energy is scarce, but rather fatty acids known as “lipids”.
Lipids form the “myelin sheath” which insulates the wires leading to and from neurons. In this way “brain fat” functions to insulate brain wiring allowing electrical messages to be carried effectively and efficiently throughout the nervous system.
So next time you’re having a good think, you can thank fat for that.