Bruce Walter Halstead, MD, who died in 2002, is best known for his pioneering research, lectures, and writing on non-toxic integrative medicine. Author of more than fifty books, and founder and director of The World Life Research Institute, he served on UN and World Health Scientific boards throughout his career and as a consultant to US military and governmental agencies. Terri Lee Holcomb-Halstead lives in Southern California. Since her marriage to Bruce Halstead in 1988, she has been an active partner in his research in ethno-botany and integrative medicine. Since his death, she has continued his work.