Which alternative therapy is thought to provide a mood-boosting effect?

St. John's Wort is recognized for its effects on mood enhancement, particularly in individuals dealing with mild to moderate depression. This herbal supplement contains active compounds, such as hypericin and hyperforin, which are believed to influence neurotransmitters in the brain, such as serotonin, dopamine, and norepinephrine. These neurotransmitters play a crucial role in regulating mood, and by enhancing their balance, St. John's Wort may help alleviate symptoms of depression and improve overall mood.

The other options, while having their own health benefits, are not specifically known for their direct mood-boosting effects in the same way that St. John's Wort is. Ginkgo biloba is primarily associated with cognitive health and improving memory and circulation. Chamomile is often used for its calming effects and to reduce anxiety, but it does not directly boost mood. Lemon balm is known for its soothing properties and can help alleviate stress, yet it is not specifically categorized as a mood enhancer in the same manner as St. John's Wort.