Charles Robert Richet (August 25, 1850 – December 4, 1935) was a French physiologist who initially investigated a variety of subjects such as neurochemistry, digestion, thermoregulation in homeothermic animals, and breathing. He won the Nobel Prize "in recognition of his work on anaphylaxis" in 1913. "The Nobel Prize in Physiology or Medicine 1913 Charles Richet". Nobelprize.org. Retrieved 5 July 2010.