Chocolate isn't just something we eat − it's something we crave, celebrate and even associate with comfort and pleasure.
We love its decadent flavor, silky smoothness and melt-in-your-mouth texture so much that it's little wonder "its scientific name literally means 'food of the gods' in Greek," says Jen Messer, a registered dietitian and president of the New Hampshire Academy of Nutrition and Dietetics.
And that devotion peaks around certain times of the year, when chocolate becomes shorthand for romance and affection and even a substitute for words that fall short. Around Valentine's Day, for instance, an estimated 58 million pounds of chocolate are sold annually.
But chocolate's enduring appeal goes beyond sweetness or tradition. Its real power lies in how it interacts with the brain and body − how it triggers pleasure, comfort and connection in ways that can be both good and bad for you.
Why does chocolate make you feel good?
Chocolate's feel-good reputation isn't just psychological − it's rooted in biology. "We know of several ways that chocolate can affect the brain and body that contribute to enhancing mood," Messer says. One way it does so is that "compounds like epicatechin in dark chocolate stimulate nitric oxide production, a known vasodilator that increases blood flow to the brain," Messer says.
Chocolate also activates the brain's reward system, as cocoa contains other compounds that can increase the availability of serotonin and dopamine − neurotransmitters associated with happiness, motivation and satisfaction. This helps explain why chocolate feels so satisfying and why cravings for it can be so strong.
Another contributor is the presence of methylxanthines such as theobromine and small amounts of caffeine. "These compounds can increase alertness, reduce fatigue, and further improve mood," Young says.
Chocolate also contains phenylethylamine, a compound sometimes called the "love chemical," because it's associated with "feelings of attraction and excitement," Young says. "However, this notion is highly debated as the body breaks down phenylethylamine during digestion, leaving little to directly affect the brain."
Is chocolate also good for you?
Beyond its impact on mood, chocolate − particularly dark chocolate − has been linked to several measurable health advantages "and has been studied for long-term cognitive benefits," Messer says.
One such benefit, she notes, is that "the flavanols in cocoa can help support neurogenesis (the growth of new brain cells) in the part of the brain associated with memory and learning, which is known as the hippocampus."
Dark chocolate is also rich in the plant compounds known as flavanols, "which are antioxidants that help reduce inflammation and support heart health," Young says. This is why some studies link regular consumption of flavanol-rich dark chocolate to modest improvements in blood pressure and cholesterol profiles. There's also evidence that dark chocolate's antioxidant properties can help reduce oxidative stress, potentially making it helpful in improving aging and chronic disease.
"But these benefits are most associated with dark chocolate, not white or the more sugary milk chocolate," stresses Messer.