Could lemon balm help people with benign heart palpitations?

Maybe, although there is not much research in this area. One 2015 randomized clinical trial in 71 people in Iran with benign heart palpitations who took either a placebo or 1,000 mg of freeze-dried lemon balm extract for 14 days found that, in the 55 participants who completed the study, the participants who took lemon balm reported less-frequent palpitations than the participants who took the placebo. The number of participants in the lemon balm group with anxiety and insomnia also decreased more than in the placebo group.^[1] However, this was a single study; more research is needed.