Effectiveness of Dark Chocolate and Music in Dysmenorrhea

Participants listened a song with headphones that lasts 29 minutes and 32 seconds for four days (three days before menstruation and the first day of menstruation).

Participants ate 40 mg of dark chocolate with 60% cocoa per a day for four days (three days before menstruation and the first day of menstruation) that was given by researchers to them.