2006-10-15 04:03:06 · 2 answers · asked by alkay9569 1 in Health ➔ Diet & Fitness
KJ, I assume, stands for "kilojoules". This would be another way to measure the energy given out while it burns, a substitute for the more popular term, "calories".
1 calorie = 4.2 kilojoules
2006-10-15 04:05:49 · answer #1 · answered by geek49203 6 · 0⤊ 0⤋
Food energy is the amount of energy in food that is available through digestion. The values for food energy are expressed in kilocalories (kcal) and kilojoules (kJ
one calorie is equal to roughly 4.2 kj
For example, pure sugar releases about 3.95 kilocalories per gram (16.5 kJ/g) of gross energy but the digestibility coefficient of sugar is about 98% in humans, so the food energy of sugar is 0.98 Ã 3.95 = 3.87 kilocalories per gram (16.2 kJ/g) of sugar. Note, the digestibility coefficient is likely to vary between individuals based on genetic predisposition, and possibly may be affected by state of physical fitness of the individuals measured, but the mean digestibility for most people is around 98%
The "Calorie" has become a common household term, because dietitians recommend in cases of obesity to reduce body weight by increasing exercise (energy expenditure) and reducing energy intake.
2006-10-15 04:10:51 · answer #2 · answered by terra_chan 4 · 0⤊ 0⤋