Chlorella and nuclear radiation: Chlorella is one of the most widely studied of the algaes and has been described as having the highest chlorophyll content. Animal studies indicate a chlorophyll rich diet increases the survival of experimental animals after lethal doses of radiation. Studies dating back to the 1950’s, including a US Army study, confirm these findings. According Roy Upton, director of the American Herbal Pharmacopeia, the use of chlorella was first developed by the Japanese as an antidote and treatment against atomic radiation. Chlorella and liquid chlorophyll can also be found in most health food stores.