HKU study shows homovanillic acid can help relieve depression. Research has found that homovanillsic acid (HVA) and intestinal bacteria (R.

intestinalis, B. longum) play an important role in alleviating depression, bringing a new perspective to the development of new drugs for depression. It is also a new advancement in the scientific discovery of the early gut-brain axis. He and the research team are deeply encouraged and hope that this discovery can bring a ray of light to the gloomy world of patients with depression.