The best swimmers among female Ironman triathletes complete the swimming portion of the event in 50 minutes to an hour. At the World Championship, the cutoff time for all competitors is two hours, 20 minutes. Any participant who fails to complete the 2.2-mile swim within that time is eliminated from the competition.
Vitamin K: One of two naturally occurring fat-soluble vitamins (vitamin K1 and vitamin K2) needed for the clotting of blood because of an essential role in the production of prothrombin (a clotting factor).
B12 synthesis is known to occur naturally in the human small intestine (in the ileum), which is the primary site of B12 absorption. As long as gut bacteria have cobalt and certain other nutrients, they produce vitamin B12. According to Dr Michael Klaper, vitamin B12 is present in the mouth and intestines.o foods naturally contain vitamin B12 - neither animal or plant foods. Vitamin B12 is a microbe-a bacteria-it is produced by microorganisms. Vitamin B12 is the only vitamin that contains a trace element-cobalt-which gives this vitamin its chemical name-cobalamin-which is at the centre of its molecular structure.