Tell me more about the ingredients in this blend...St. John's wort is an herbal remedy that has long been used in Europe to support healthy mood. Studies have indicated that standardized extracts of St. John's wort are as effective as prescription medications in the treatment of mild to moderate depression. The B vitamins, especially folic acid, are essential nutrients vital for nervous system function. Research indicates they may even increase the efficacy of prescription antidepressant medications. Recent preliminary studies suggest that omega-3 fatty acids found in fish oil may be helpful in maintaining optimum brain function and mood. Fish oil is the best source of docosahexaenoic acid (DHA), an essential fatty acid found in nerve and brain tissue.