Many calories come from sugar, but that is not necessarily the most concentrated source. Things like proteins and dairy also have a lot of calories.
Wiki User
∙ 9y agoAnonymous
sugar
Fat (Lipids)
Fats (lipids) offer the most concentrated energy source (i.e the most kilojoules of energy per gram, compared with other nutrients).
fats
fats
fats
Energy in all foods comes from calories, which are in starches, fats and proteins. Peanuts contain a high percentage of fat, which is the source of most of their calories, or energy.
Fat=lipids
Most calories a burned off by sweating
water
food
nonrenewable source
If you are referring to water vapor in the atmosphere, most comes from the largest water source on the planet, the oceans.