From: mrou...@shaw.ca   
      
   On Saturday, December 17, 2022 at 6:00:54 PM UTC-7, RichD wrote:   
   > How do they measure the calorie content of food items?    
      
   The standard way of measuring the calorie content of food is to use bomb   
   calorimetry. In this technique, the food is completely burned and you measure   
   how much heat is produced. This is slightly deceiving because you can't   
   necessarily use all of the    
   calories that you would get by literally burning the food. If you ever study   
   physiology, you will probably run into the concept of catabolizable energy at   
   some point, which is the amount of energy in the food that your body really   
   can use. If you're    
   interested in these topics, you can check out section 5.11 of my physical   
   chemistry textbook (http://www.cambridge.org/roussel).   
      
   Depending on the country of origin and legal standards, it's often permissible   
   to calculate (rather than measure) the calorie content of foods from the   
   composition and calorie counts of the ingredients, or sometimes just from the   
   rough breakdown into    
   carbohydrates, proteins and fats.   
      
   Marc Roussel   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)