for which we are simply
hardwired, like being active
during the day and sleeping at
night, liking sweet tastes, and
experiencing thirst when we are
dehydrated. In the natural world,
these primal urges are designed to
keep us safe, fed, hydrated, and
healthy. But in today’s modern
world, these biological signals
don’t always work the same way
—and our ability to override them
often gets us into trouble.
Understanding the biological
purpose of these signals and how
to hear them over all the noise in
today’s busy world is one of the
keys to optimal health.
Now is a good time to address one of our
most commonly heard questions: Do you have
the science to back this stuff up? The answer,