continues to send biologically
appropriate messages to ensure
your survival, despite the fact that
you are now living in a wholly
unnatural food landscape.As fat is a storage depot for energy, it is
important for your body to have a way to
measure how much energy (fat) is available at
any given moment. Fat cells do this by
secreting leptin, as a way to communicate to
your brain whether you are too fat, too lean, or
just right. Based on leptin’s critically
important message, your brain constantly
gives you subconscious directions, which
drive your food-seeking behavior and physical
activity levels.
If you have very little body fat—perhaps
too little to survive a potential food shortage
—leptin levels are low. The relative absence
of leptin’s message tells the brain, “I don’t