A little taste of dark chocolate can not only make your day sweeter—it may also give you more days to enjoy.

Scientists have identified a chemical in dark chocolate that could slow cellular aging. However, the findings are not a free pass to drown in candy bars.

Markers of Aging Decreased

Researchers from King’s College London have discovered that theobromine, a compound found in dark chocolate, is linked to a slower rate of cellular aging.

The study, recently published in Aging, examined blood samples from 1,669 people across two European cohorts and found that those with higher theobromine levels showed younger biological ages based on DNA markers. People with higher levels of theobromine had fewer DNA changes linked to biological aging.

“Our study finds links between a key component of dark chocolate and staying younger for longer,” senior study author Jordana Bell, a professor in epigenomics at King’s College London, said in a statement.

It’s Not Just Chocolate

The team found that this effect was specific to theobromine. Other compounds found in cocoa and coffee didn’t show the same association.

Researchers found that eating more dark chocolate was linked to fewer DNA markers of aging and to retaining telomere length, the protective caps on chromosomes that shorten over time as people age.

However, scientists noted that eating more dark chocolate isn’t the answer. The bars also contain sugar and fat, and too much theobromine can cause problems. Symptoms of excess theobromine intake include increased sweating, incidence of headache, and acute digestive issues.

Eating 50 to 100 grams of cocoa powder (containing 0.8 to 1.5 grams of theobromine) can cause sweating, headaches, and digestive issues, James H. Swain, director of the didactic program in nutrition and dietetics at Case Western Reserve University, who wasn’t involved in the study, told The Epoch Times.

“These symptoms may also be related to theobromine’s chemical similarity to caffeine and/or the effects of caffeine as well,” he noted. “Since many products that contain theobromine also contain caffeine.”

For those interested in theobromine beyond chocolate, other dietary sources include green and black teas, coffee, and yerba mate, a traditional South American tea. “These also pair superbly with dark chocolate, by the way,” Swain added.

The findings raise new questions about how diet influences aging.

Plant compounds like theobromine may influence aging by changing how our genes are turned on or off. Some of these compounds, called alkaloids, can interact with the cellular machinery that controls gene activity and may impact health and longevity.

“This is a very exciting finding, and the next important questions are what is behind this association and how can we explore the interactions between dietary metabolites and our epigenome further?” said lead researcher Dr. Ramy Saad from King’s College London and University College London in the statement. “This approach could lead us to important discoveries towards ageing, and beyond, in common and rare diseases.”

Although theobromine is best known as the substance in chocolate that’s toxic to dogs, it has been linked to health benefits in humans, such as a lower risk of heart disease. However, it has not been extensively studied until now.

Professor Ana Rodriguez-Mateos, a professor of human nutrition at King’s College London, noted in the statement that future research will explore whether the effect is unique to theobromine or if it interacts with other beneficial compounds in dark chocolate, such as polyphenols.

“While we’re not saying that people should eat more dark chocolate, this research can help us understand how everyday foods may hold clues to healthier, longer lives,” Bell said.