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.
In natural and alternative medicine fields, probiotics are sometimes used to prevent or even treat digestive and intestinal conditions.
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).
Naturopathy is the use of alternative medicine to treat the patient's body and mind.
As a graduate of a Doctor of Alternative Medicine distance learning program you would have the opportunity to work in health clubs, health resorts, hotels, medical facilities and private practice.