, and it is a rugged, edible plant that provided an important dietarysupplement for people living in harsh conditions. The leaves, flowers, and seeds of the cannabis plant have been used by human beings for at least 4,500 years, and cannabis was
Ziegler P. J., Nelson J. A., Jonnalagadda S. S. (2003): Use of dietarysupplements by elite figure skaters. International Journal of Sport Nutrition and Exercise Metabolism , 13: 266–276.
Ziegler P., Hensley S., Roepke J. B