Just in time for Valentine's Day, the American Chemical Society (ACS), the world's largest scientific society, has released a new Bytesize Science video featuring five chemistry facts that highlight why chocolate, in moderation, may be good for you.

The video explains how a bar of chocolate contains hundreds of compounds, many with beneficial properties. Among the video's "sweet" facts:
  • Chocolate may improve your mood, and not just because of its delicious flavor. Chocolate contains a number of chemicals that inhibit the breakdown of the neurotransmitter anandamide - sometimes called "the molecule of bliss" - which can block feelings of pain and depression.
  • Chocolate contains caffeine and theobromine, stimulants that can provide a burst of energy.
  • According to an article from the ACS' Journal of Agricultural and Food Chemistry, the naturally occurring polyphenols in cocoa - the key ingredient in chocolate - boost levels of HDL, commonly known as the "good cholesterol."
  • Chocolate may reduce stroke risk in men.
  • A little dark chocolate may reduce stress.