Types of Sugars
-Fructose occurs naturally in fruits and honey.
-It also appears in products sweetened with high-fructose corn syrup, a corn
product used as an additive.
-Bound to another monosaccharide to from the sugar in milk, galactose seldo
Fructose and Lactose
-Because the fructose is in a position accessible to the taste receptors, sucrose
tastes sweet, accounting for some of the sweetness of fruits, vegetables, and
-To make table sugar, sucrose is refined from the juices of sugar
-Tubers, such as potatoes, yams, and the cassava of many non-Western
societies, are another major source of starch.
-Obtaining ample starch from the diet is a major part of healthy eating.
Digestion and Absorption of Starch and Sugars
The three monosaccharides important in nutrition all have the same number and
kinds of atoms, but in different arrangements.
-These chemical differences account for the differing sweetness of the
-A pinch of purified glucos
Glycogen is found in meats only to a limited extent and does not occur in plants
-For this reason, glycogen is not a significant food source of carbohydrate, but it
does perform an important role in the body. It is the form in which the h
-At this point, all disaccharides contribute at least one glucose molecule to the
-Other monosaccharides can eventually become glucose after being processed
in the liver.
-Within one to four hours after a meal, all the available carb
The Carbohydrates, Sugars, Starch, and Fibers
-A student, quietly studying a textbook, is seldom aware that within his brain
cells, billions of glucose molecules are splitting each second to prove the energy
that permits him to learn.
-Yet, glucose provid
Storing Glucose as Glycogen
-They also need to check all drugs with the pharmacist because 20 percent of
prescription drugs and 5 percent of over the counter drugs contain lactose as a
-Excluding milk and milk products from the diet can lead to nu
The Types of Simple Carbohydrates
-To understand the structure of carbohydrates, look at the units of which they are
-The sugars most important in nutrition are the monosaccharide known as 6carbon sugars,
-Instead, numerous lactose molecules remain in the intestine undigested,
attracting water and causing bloating, abdominal discomfort, and diarrhea.
-These are the symptoms of lactose intolerance.
-The lactose becomes food for intestinal bacte