Kcal is one Calorie. It is a 1000 calories. In other words people need 2,000,000 calories a day, but only 2000 Kcal or Calories. Sorry for the confustion.
From wikipedia
Quote:
The calorie is a unit of energy, in particular heat.[1] In most fields, its use is archaic, and the SI unit of energy, the joule, has become accepted. However, it remains in common use as a unit of food energy. It was first defined by Professor Nicolas Clément in 1824 as a kilogram-calorie, and this definition entered French and English dictionaries between 1841 and 1867. Etymology: French calorie, from Latin calor (heat).
The unit calorie has historically been used in two major alternate definitions that differ by a factor of 1000:
The small calorie, gram calorie, or calorie (symbol: cal) is the amount of heat (energy) required to raise the temperature of one gram of water by 1 °C.
The large calorie, kilogram calorie, kilocalorie (symbol: kcal), or Calorie (capital C) is the amount of heat (energy) needed to increase the temperature of one kg of water by 1 °C, exactly 1000 small calories, or about 4.184 kJ.
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emphasis added
Where is that reccomentdation? Is there any research to back it up? And as far as defeciancy goes, i don't think I'll be taking my information from
Anderson A Anonymous.
Edited to say oops i didn't realize that i had accidentaly capitalized teh c in the Kcal. My bad. However kcal is always one Calorie, even if the wrong leter is capitalized.