Is this too good to be true? Investigators at the Nestlé Research Center in Switzerland found that eating a little chocolate every day for two weeks reduces levels of stress hormones. The investigators recruited 30 volunteers, male and female ages 18-35, who were interviewed to assess their general anxiety. Those who rated themselves as highly stressed were then asked to consume 1.4 ounces of dark chocolate per day for two weeks. The researchers reported that eating the chocolate appeared to reduce levels of stress hormones in these volunteers. This isn't the first study to suggest that chocolate can ease emotional stress, but it is the first to identify the positive biochemical changes chocolate promotes. The study was published online on October 7, 2009 in the Journal of Proteome Research, a publication of the American Chemical Society. Other studies have shown that antioxidants in chocolate can make blood vessels more flexible and that the flavonoids chocolate contains can reduce the stickiness of platelets, inhibiting blood clotting and possibly reducing the risk of developing coronary artery blockages.