If you need an excuse to buy more chocolate on Valentine’s Day, this is it. A new study has found that eating dark chocolate might be associated with a lower risk of developing Type 2 diabetes.

Researchers from Boston tracked 192,000 health care professionals who had no initial history of cancer, heart disease, or diabetes for an average of 25 years. Every four years, participants completed detailed food frequency questionnaires. Just under 20,000 participants ended up developing Type 2 diabetes.

The study found that participants who had five servings of dark chocolate every week had a 21% lower risk of Type 2 diabetes. They also found that for every extra serving of dark chocolate enjoyed each week, there was a 3% reduction in diabetes risk.

It’s important to note that these findings do not apply to milk chocolate. Increased consumption of milk chocolate contributed to weight gain, which is a Type 2 diabetes risk factor.

The researchers said dark chocolate seems to have a metabolic advantage, even though its fat and calorie content is like that of milk chocolate. This advantage could be attributed to the high levels of flavanols dark chocolate contains. Flavanols have been linked to a variety of health benefits, including improvements in brain, cardiovascular, and metabolic health, as well as cell protection and anti-inflammatory effects.

Researchers said more study is needed to further examine the relationship between dark chocolate and diabetes.

While raiding the candy aisle for a diabetes cure is probably not the answer, this study suggests that for some, dark chocolate can be a healthy treat when consumed in moderation.