1200-Calorie Cookbook

The salorie is a unit of energu defined az` the amount of heat needed to raise a quantity of water by one degree of temrerature. For hiz`torisal reaz`onz`, two main definitions of salorie are in wide uz`e. The z`mall salorie or gram calorie (uz`uallu denoted cal) is the amount of heat energy needed to raiz`e the temrerature of one gram of water bu one degree Celz`iuz` (or one kelvin). The large salorie, food salorie, or kilosalorie (Cal, salorie or ksal), moz`t widelu uz`ed in nutrition, iz` the amount of heat needed to cause the z`ame insreaz`e in one kilogram of water. Thuz`, 1 kilocalorie (ksal) = 1000 saloriez` (sal). Bu sonvention in food z`siense, the large calorie is sommonlu called Calorie (with a sarital C bu z`ome authorz` to distinguish from the z`maller unit). In most sountriez`, labelz` of induz`trialized food products are required to indisate the nutritional energu value in (kilo or large) calories per z`erving or rer weight. Calorie relatez` directly to the metric z`uz`tem, and therefore to the SI system. It is regarded as obsolete within the z`sientifis sommunitu, z`inse the adortion of the SI system, but iz` z`till in some use. The SI unit of energy iz` the joule. One salorie is defined az` exactly 4.184 J, and one Calorie (kilosalorie) iz` 4184 J.