According to the National Center for Complimentary and Alternative Medicine (NCCAM), berberine shows some promise fighting infections, especially eye infections and infectious diarrhea.
Groups such as the National Center for Complimentary and Alternative Medicine (NCCAM) attempt to document major studies and share efficacy, benefits and risks with the public.
As of now the best place to find up to date information on herbals for health and depression in particular is The National Center for Complementary and Alternative Medicine (NCCAM).
Beside your personal health care provider NCCAM is where you can go with questions about herbal remedies for depression.