You probably know that research has confirmed this herb's power to relieve mild to moderate depression and anxiety as effectively as many drugs—without a lot of the side effects.
It might also: Help you snooze more soundly. St. John's wort not only contains melatonin, the hormone that regulates our sleep-wake cycles, but it also increases the body's own melatonin, improving sleep, says a report from the Surgeon General. (These 20 ways to sleep better every night can also help.)
Maximize the benefits: For both mood and sleep problems, author Duke recommends a supplement containing at least 0.3% hypericin (the active phytochemical) per capsule or 300 mg of the extract to be taken three times daily. Warning: St. John's wort has been shown to interact with several prescription medications, so be sure to check with your doctor before taking it.