A calorie is not a calorie in the human body which is not a calorimeter chamber

http://journals.cambridge.org/images/fileUpload/documents/PHN2014-007802_1.pdf

http://jnls.cup.org/pdftext.do?componentId=9428230&jid=PHN&freeFlag=Y

http://hrsbstaff.ednet.ns.ca/sweetap/thermonotes1.htm