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Learn About Sucrose And Fructose

Jun 21, 2008
Sugar and fructose are found in many foods, making the diet difficult to follow. Sugar consumption is far, far higher today than it was 30 years ago and a couple magnitudes higher than a century ago. It is just a fact, humans were not designed to consume so much sugar, whether its sucrose, fructose, maltose, lactose or glucose.

Sucrose and fructose are metabolized completely differently. There are different feedback loops that are omitted during the metabolism of fructose with major, and unwanted biological implications. Sucrose is glucose plus fructose stuck together. Because the fructose in sucrose is bound up, it is much safer for your body. Sucrose ), and they act on polarized light.

Sucrose is 50% fructose, so HFCS may have a higher or lower fructose content than sucrose, with a corresponding change in sweetness. Sucrose is broken down during digestion into fructose and glucose through hydrolysis by the enzyme sucrase. Sucrose is a compound composed of two simple sugars, glucose and fructose in a ratio of 50 percent glucose and 50 percent fructose. Contrary to its name, HFCS is not high in fructose.

Sucrose inversion is generally carried out by adding invertase in either free or immobilized form to the sugar-enhanced press liquor and permitting inversion to occur over about a 1-2 hour period at a temperature of about 60? C.

At the end of this period the temperature is elevated (about 80? C.) or the pH raised (to about 7-8) sufficiently to inactivate the enzyme. Sucrose is cleaved into glucose and fructose in the intestine before being absorbed. So sucrose is also a source for fructose.

Fructose is commonly called "fruit sugar" because it is the main sugar in many fruits. However, fructose is now produced from corn syrup, which is derived from corn. Fructose differs in several ways from glucose, the other half of the sucrose (sugar) molecule.

Fructose is absorbed from the gastrointestinal tract by a different mechanism than that for glucose. Fructose is a natural sugar found in many fruits and vegetables. Table sugar, or sucrose, is half fructose and half glucose.

Fructose has the same number of calories as sucrose but a lower glycemic index , which means that it causes a smaller increase in blood sugar levels. A couple of years ago, agave syrup became popular as a "healthier" sweetener because it contains mostly fructose and has a low glycemic index.

Fructose can only be metabolized in the liver. Excess fructose can lead to excess triglycerides and lipidemia (the bad cholesterol). Fructose reduced the affinity of insulin for its receptor. This is the first step for glucose to enter a cell and be metabolized.

Glucose homeostasis is essential for life. Since most of an organism's life is spent in a fasting state (ie, between meals), no fewer than 3 major mechanisms have evolved to maintain glucose homeostasis during a fast, namely, gluconeogenesis, glycogenolysis, and lipolysis.

Glucose causes the pancreas to release insulin which drives sugar from the bloodstream into cells. Glucose causes fat cells to release leptin that makes you feel full so you eat less.
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