Calories

How do they arrive at the number of calories in a specific food item. How is it measured . Can we do it ?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

http://www.nal.usda.gov/fnic/foodcomp/search /
--

- Billy
"For the first time in the history of the world, every human being
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Andy Petro wrote:

It is done by building a list of the calorific value of the ingredients and calculating their sum. The calorific values per weight of standard ingredients is (sugar, oil etc) is known. These were derived from measurements where the substance was burned under controlled conditions to measure the heat produced per unit of weight.
Yes you can do it by getting a calory counter book which has tables of basic substances and of some prepared foods and tediously weighing each component of your meal and doing the sums.
David
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Yes. Calories determined strictly by combustion would not be as accurate because stuff like fiber that burns would not be digested in the human body:
http://www.enotes.com/food-encyclopedia/calorie
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.