Henrik Dam (Full name Carl Peter Henrik Dam) (21 February 1895 – 17 April 1976) was a Danish biochemist and physiologist.

He was awarded the Nobel Prize in Medicine in 1943 for joint work with Edward Doisy work in discovering vitamin K and its role in human physiology. Dam's key experiment involved feeding a cholesterol-free diet to chickens. The chickens began hemorrhaging and bleeding uncontrollably after a few weeks. Dam isolated the dietary substance needed for blood clotting and called it the "coagulation vitamin", which became shortened to vitamin K.