We all have one. At least one. A little darling. A best friend. A
helper, a life raft. An entrenched habit that's so comfortable, it feels
like a hug or an island of calm. A fix.
A fix starts simply enough. You think about doing something that you
like to do—drink a mojito or check your iPhone—and that thought lights
up an entire dopamine-driven reward pathway in your brain. You try, but
you just can't get that urge out of your head. You give in. And then, as
soon as you satisfy the raging hunger, bingo: You feel another rush.
Your brain says, "Yeah! This is amazing. I want more." You need your
fix.
This Is Your Brain On Food
Most of the time, this neurological process is a good thing. This
same reward system drives us to learn, to create, to innovate, to pursue
our goals. But as a medical doctor specializing in metabolism and
weight management, I've seen firsthand how the rush of dopamine—a brain
chemical that makes us feel a brief burst of pleasure and
satisfaction—cuts both ways. That healthy high you get from, say, a run
in the park occupies the same pathways as, and can easily become
confused with, the dopamine hit from a snort of cocaine or a puff of a
cigarette.
I'm seeing a growing manifestation of this double-edged sword in my
own medical practice. More and more men and women are desperate to find
an answer to the same questions: "Why can't I stop thinking about food?
How can a cookie or plate of pasta or bag of chocolates have this kind
of hold on me? I feel like a junkie!"
As I've listened to people's tortured stories of unbearable cravings,
yo-yo dieting, weight obsession, and emotion-driven stress eating, I've
seen a pattern emerge. The pleas for help are no longer your standard
"Gosh, I'd love to drop 10 pounds before the reunion" fare. Instead,
these entreaties are eerily similar to the cries for help from my
patients with hard-core drug or alcohol addictions: "I need that sugar
fix every afternoon, or I'll go crazy with withdrawal." "I need a dose
of pizza." "Chips and dip are like crack to me—once I start, I just
can't stop."
These cravings are the result of a reward system gone awry. New
science shows that the mere anticipation of a food-related dopamine high
will cause the brain's reward centers to light up like Times Square on
New Year's Eve. It doesn't take much to trigger this cascade of brain
chemicals: A casually mentioned word, a picture in a magazine or on TV,
or a smell from a bakery can awaken the desperate cravings.
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