Yes. Consider these natural alternatives: Gastrodin (an extract from a Chinese herb called Gastrodia), fish oil (omega-3 oil), magnesium, tyrosnine, niacin, thiamin, vitamin B6, St. John’s Wort and Rhodiola rosea. Most of these supplements require dosages far beyond what the U.S. RDA recommends in order to be effective. All are backed by scientific research and literature.