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creatine

A Dictionary of Nursing | 2008 | Copyright

creatine (kree-ă-teen) n. a product of protein metabolism found in muscle. c. kinase (CK, c. phosphokinase, CPK) an enzyme involved in the breakdown of creatine to creatinine, isomers of which originate in the brain and thyroid, skeletal muscle, and heart. Damage to these tissues results in increased levels of the isomer in the serum. c. phosphate (phosphocreatine, phosphagen) the phosphate of creatine, which acts as a store of high-energy phosphate in muscle and serves to maintain adequate amounts of ATP.

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creatine

A Dictionary of Biology | 2004 | Copyright

creatine A compound, synthesized from the amino acids arginine, glycine, and methionine, that occurs in muscle. In the form of creatine phosphate (or phosphocreatine), it is an important reserve of energy for muscle contraction, which is released when creatine phosphate loses its phosphate and is converted to creatinine, which is excreted in the urine (at a rate of 1.2–1.5 g/day in humans). See also phosphagen.

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creatine

A Dictionary of Food and Nutrition | 2005 | | Copyright

creatine A derivative of the amino acids glycine and arginine, important in muscle as a store of phosphate for resynthesis of ATP during muscle contraction and work. Not a dietary essential, since it is synthesized in the body, but widely sold in supplements to improve athletic performance, with limited evidence of efficacy.

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DAVID A. BENDER. "creatine." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

DAVID A. BENDER. "creatine." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O39-creatine.html

DAVID A. BENDER. "creatine." A Dictionary of Food and Nutrition. 2005. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O39-creatine.html

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Free newspaper and magazine articles

	Creatine: Separating Fact from Hype.(Report) Newspaper article from: Sports Medicine Reports; 8/1/1999
	Creatine Supplementation for Enhancement of Athletic Performance. Newspaper article from: Alternative Medicine Alert; 7/1/1998
	MAGNESIUM CREATINE CHELATE: NUTRITIONAL "DYNAMIC DUO". Magazine article from: Health Products Business; 6/1/2001