Hexose — Fast

: The most abundant sugar in nature and the main fuel for cellular respiration.

Hexoses are primarily classified by their functional groups: : Contain an aldehyde group ( −CHOnegative cap C cap H cap O ) at the end of the carbon chain. hexose

A Climber's Guide to Carbohydrates: Part I - Climbing Nutrition : The most abundant sugar in nature and

. They are the primary energy source for most living organisms and serve as fundamental building blocks for larger carbohydrates like starch and cellulose. They are the primary energy source for most

: Commonly found in fruits and honey; it is sweeter than glucose and follows a different metabolic pathway in the liver. 2. Structural Features Hexoses can shift between two main structural forms:

: Found in dairy products; it must be converted to glucose in the liver to be metabolized. Ketohexoses : Contain a ketone group ( ), typically at the second carbon position.