A small piece of dark chocolate after dinner, once seen as an indulgent treat, is now being considered a beneficial addition to a bedtime routine. Dark chocolate is increasingly recognized for its health benefits, thanks to its high content of nutrients and compounds that support well-being. These benefits are particularly relevant for those struggling with sleep, as dark chocolate contains tryptophan, an amino acid that helps the body produce serotonin and melatonin—hormones linked to relaxation and sleep. Additionally, dark chocolate is rich in magnesium, a mineral that promotes muscle relaxation, reduces stress, and supports better sleep. Flavonoids in dark chocolate also improve blood circulation, increasing oxygen flow to the brain and contributing to both mental and physical relaxation. Despite these benefits, dark chocolate may not be suitable for everyone, especially those sensitive to stimulants. It contains small amounts of caffeine, which can interfere with sleep in some individuals. Dark chocolate with a cocoa content of 65-70% or more is generally considered a good choice for those on calorie-restricted diets, as a 10-gram serving contains about 60 calories. However, the caffeine content should be taken into account, particularly for those who are more sensitive to it. Compared to milk chocolate, dark chocolate is typically a better choice in the evening due to its lower sugar content and higher levels of antioxidants and magnesium. However, it does contain more caffeine than milk chocolate. For those who are sensitive to caffeine, a small piece of milk chocolate might be a more suitable alternative. A study involving 20,000 people over three and a half years found that those who took cocoa extract supplements had a 20% lower risk of dying from heart disease compared to those who took a placebo. Professor Tim Spector, an expert in genetic epidemiology at King's College London, highlights that dark chocolate with more than 70% cocoa is a healthy choice. He advises checking the ingredient list to ensure the chocolate contains minimal additives, with artisan chocolate bars being the best option, as they often include only a few ingredients such as cocoa and fermented beans.