Lactic acid
The end product of anaerobic metabolism is lactic acid. At physiologic pH ranges in the human body a hydrogen ion quick separates from lactic acid forming lactate. Lactate can then diffuse across cell membranes and into the blood stream. In the laboratory lactate is the compound that is measured in the blood. If cells are deprived of oxygen, instead of using aerobic (with oxygen) metabolism to function, the cells use the anaerobic (without oxygen) pathway to produce energy. Unfortunately, lactic acid is formed as a by product of anaerobic metabolism. Recently there seems to be an increase in interest about lactate and lactic acid among endurance athletes. The common belief, or rather mis-belief, is that; One, when an athlete reaches their lactate threshold they begin to produce lactate, which is a waste product of anaerobic metabolism. The body is dependent upon two processes to create energy at rest and during exercise, aerobic and anaerobic metabolism. Simplified, the aerobic metabolic system uses oxygen, while the anaerobic system does not; however, oxygen plays a vital role in allowing the body to function under both systems. When one glucose molecule is converted into lactic acid in anaerobic metabolism, three ATP molecules are generated. When a glucose molecule is converted into carbon dioxide and water via aerobic metabolism, it produces 39 molecules of ATP. However, glycolysis requires powerful enzymes that compensate for the lower energy efficiency of anaerobic metabolism. What limits the anaerobic process is the byproduct, or lactic acid. Glycolysis is the metabolic pathway common to both aerobic and  anaerobic processes of sugar breakdown. It is the metabolic pathway  that converts glucose into pyruvate. All … organisms produce a high  energy compound ATP by releasing energy stored in glucose and other  sugars. Aerobic respiration, a process that uses oxygen, and anaerobic respiration, a process that doesn't use oxygen, are two forms of cellular respiration. Although some cells may engage in just one type of respiration, most cells use both types, depending on an organism's needs. The body's metabolic process usually involves the oxidation of glucose. When the body cannot get enough oxygen to meet the demands for energy, cells begin using the anaerobic process (without oxygen). This process breaks down glucose and glycogen to lactic acid which then diffuses into the blood stream.
http://www.xtri.com/features/detail/284-itemId.511712207.html http://www.emedicinehealth.com/shock/page2_em.htm http://www.xtri.com/features/detail/284-itemId.511712207.html http://my.moxymonitor.com/blog/bid/236376/The-Role-of-Oxygen-in-Aerobic-and-Anaerobic-Metabolism http://healthyliving.azcentral.com/aerobic-anaerobic-metabolism-14829.html http://www.answers.com/Q/What_is_anaerobic_metabolism http://www.diffen.com/difference/Aerobic_Respiration_vs_Anaerobic_Respiration http://www.answers.com/Q/What_is_anaerobic_metabolism
what is a common product of anaerobic metabolism