Fructose is found widely in the diet as a free monosaccharide hexose, as the disaccharide, sucrose and in a polymerized form (fructans) as a component of plant oligosaccharides. Because fructose is considerably sweeter than sucrose or glucose, it is used to enhance the flavor, color stability, and freezing point depression of many foods and beverages. Fructose is also used in place of sucrose and other carbohydrates in dietetic products.

Diet Rx natural appetite suppressant
If you would like to eat less, consider a product called Diet Rx. This natural appetite suppressant works without stimulants. Diet Rx has no added caffeine, ephedra, ephedrine alkaloids, synephrine, hormones, guarana, ginseng, or stimulating amino acids. 

Benefits of Diet Rx
All natural appetite suppressant, decreases appetite so you eat less
Helps you maintain healthy blood sugar levels
Helps you maintain healthy cholesterol and lipid levels
Provides a variety of antioxidant from two dozen herbs and nutrients
Provides healthy fiber
Improves energy
Balances mood
Improves mental concentration and focus
Improves will power and choice of food selection

You can buy Diet Rx here, find out the ingredients, and see a list of hundreds of high quality natural supplement products

Fructose in diet
Most fructose in the American diet comes not from fresh fruit, but from high fructose corn syrup or sucrose (sugar) that is found in soft drinks and sweets. In 1966, refined sugar, also known as sucrose, held the No. 1 slot, accounting for 86 percent of sweeteners used. Today, sweeteners made from corn are the leader, racking up $5 billion in annual sales and accounting for 55 percent of the sweetener market. That switch largely reflects the steady growth of high fructose corn syrup, which climbed from zero consumption in 1966 to 62 pounds per person in 2001.

Fructose content in foods - benefit of fructose through eating fruits as opposed to processed foods and drinks
Honey, dates, raisins, molasses, and figs have a content of fructose greater than 10%. Grapes, raw apples, apple juice, persimmons, and blueberries have a fructose content of 5–10% by weight. Milk has hardly any fructose, nor do most vegetables and meats. When fructose is ingested from fruits, many other beneficial substances are also ingested including fiber and antioxidants, whereas when fructose is ingested through soft drinks or other processed foods, there is no fiber to slow the absorption of the fructose and few antioxidants to prevent or minimize the adverse effects of a high fructose intake on blood sugar or tissues.

Fructose absorption and metabolism
When ingested by itself, fructose is poorly absorbed from the gastrointestinal tract, and it is almost entirely cleared by the liver. 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. Glucose stimulates insulin release from the isolated pancreas, but fructose does not. Most cells have only low amounts of the glut-5 transporter, which transports fructose into cells. Fructose cannot enter most cells, because they lack glut-5, whereas glucose is transported into cells by glut-4, an insulin-dependent transport system. Finally, once inside the liver cell, fructose can enter the pathways that provide glycerol, the backbone for triacylglycerol.
   Fructose is easily metabolized and changed into fat. Studies in rodents, dogs, and nonhuman primates eating diets high in fructose or sucrose consistently show elevated blood lipids. The metabolism of fructose in the liver drives the production of uric acid, which utilizes nitric oxide, a key modulator of vascular function. George Bray, American Journal of Clinical Nutrition, October 2007.

Fructose consumption and gout
Consumption of sugar sweetened soft drinks and very high intake of fructose is associated with an increased risk of gout in men. Fructose rich fruits and fruit juices may also increase the risk when consumed as a high proportion of the diet.. Diet soft drinks are not associated with the risk of gout.

High fructose corn syrup
The intake of soft drinks containing high-fructose corn syrup or sucrose has risen in parallel with the epidemic of obesity. Made from corn starch, high-fructose corn syrup is a thick liquid that contains two basic sugar building blocks, fructose and glucose, in roughly equal amounts. While soft drinks and fruit beverages such as lemonade are the leading products containing high fructose corn syrup, plenty of other items -- including cookies, gum, jams, jellies and baked goods -- also contain this syrup.

Sucrose or high fructose corn syrup have similar effect on satiety
Sugars and satiety: does the type of sweetener make a difference?
American Journal of Clinical Nutrition, Vol. 86, No. 1, 116-123, July 2007. From the Nutritional Sciences Program, School of Public Health and Community Medicine, and the Department of Dental Public Health Sciences, School of Dentistry, University of Washington, Seattle, WA.
The objective of the study was to compare the relative effect of commercial beverages containing sucrose or high fructose corn syrup on hunger, satiety, and energy intakes at the next meal with the use of a within-subject design.
Thirty-seven volunteers (19 men, 18 women) aged 20–29 y consumed isocaloric cola beverages (215 kcal) sweetened with sucrose, high fructose corn syrup 42, or high fructose corn syrup 55. High fructose corn syrup 42 contains 42% fructose, and high fructose corn syrup 55 contains 55% fructose. Diet cola (2 kcal), 1%-fat milk (215 kcal), and no beverage were the control conditions. The 5 beverages were consumed at 1010 (2 h after a standard breakfast). Participants rated hunger, thirst, and satiety at baseline and at 20-min intervals after ingestion. A tray lunch (1708 kcal) was served at 1230, and energy intakes were measured. There was no differences between sucrose- and high fructose corn syrup -sweetened colas in perceived sweetness, hunger and satiety profiles, or energy intakes at lunch. The 4 caloric beverages tended to partially suppress energy intakes at lunch, whereas the no-beverage and diet beverage conditions did not; the effect was significant only for 1%-fat milk. Energy intakes in the diet cola and the no-beverage conditions did not differ significantly. Conclusion: There was no evidence that commercial cola beverages sweetened with either sucrose or high fructose corn syrup have significantly different effects on hunger, satiety, or short-term energy intakes.

Fructose and glucose consumption compared to whey protein ingestion
Appetite hormones and energy intake in obese men after consumption of fructose, glucose and whey protein beverages.
Int J Obes (Lond). 2007 Jun 26; Bowen J, Noakes M, Clifton PM.
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Human Nutrition, Adelaide, Australia, Department of Physiology, University of Adelaide, Adelaide, Australia.
To investigate appetite responses over 4 hour to fructose beverages in obese men, relative to glucose and whey protein. Second, to investigate the effect of combining whey and fructose on postprandial appetite hormones. Randomized, double-blind crossover study of four beverages (1.1 MJ) containing 50 g of whey, fructose, glucose or 25 g whey+25 g fructose. Blood samples and appetite ratings were collected for 4 h then a buffet meal was offered. Subjects were twenty-eight obese men. Measurements were done of plasma ghrelin (total), glucagon-like peptide-1 (GLP-1 7-36), cholecystokinin-8, glucose, insulin and appetite ratings were assessed at baseline and 30, 45, 60, 90, 120, 180, 240 min after beverages, followed by measurement of ad libitum energy intake. Results: Fructose produced lower glycemia and insulinemia compared to the glucose treatment; whereas postprandial ghrelin, GLP-1 and cholecystokinin responses were similar after both treatments. Whey protein produced a prolonged (2-4 h) suppression of ghrelin and elevation of GLP-1 and cholecystokinin that were reduced when combined with fructose, while glucose and insulin responses were similar. Energy intake after 4 h was independent of beverage type. Conclusion:In obese men, fructose- and glucose-based beverages had similar effects on appetite and associated regulatory hormones, independent of the differing glycemic and insulinemic responses. The contrasting profile of plasma ghrelin, GLP-1 and cholecystokinin after whey protein consumption did not impact on ad libitum intake 4 h later and was attenuated when 50% of whey was replaced with fructose.

Fructose absorption
Free fructose has limited absorption in the small intestine, with up to one half of the population unable to completely absorb a load of 25 g. Average daily intake of fructose varies from 11 to 54 g around the world. Fructans are not hydrolysed or absorbed in the small intestine. The physiological consequences of their malabsorption include increasing osmotic load, providing substrate for rapid bacterial fermentation, changing gastrointestinal motility, promoting mucosal biofilm and altering the profile of bacteria. These effects are additive with other short-chain poorly absorbed carbohydrates such as sorbitol. The clinical significance of these events depends upon the response of the bowel to such changes; they have a higher chance of inducing symptoms in patients with functional gut disorders than asymptomatic subjects. Restricting dietary intake of free fructose and/or fructans may have durable symptomatic benefits in a high proportion of patients with functional gut disorders, but high quality evidence is lacking. It is proposed that confusion over the clinical relevance of fructose malabsorption may be reduced by regarding it not as an abnormality but as a physiological process offering an opportunity to improve functional gastrointestinal symptoms by dietary change.

Fructose malabsorption
Dietary fructose induces abdominal symptoms in patients with fructose malabsorption.

Fructose and flatulence
The intake of fructose has risen significantly in the US, mainly through an increased consumption of high-fructose corn syrup in soft drinks and various confections. Increased consumption of fructose can cause gastrointestinal distress, resulting in symptoms such as bloating, flatulence and diarrhea. Individuals with altered gastrointestinal function, such as inflammatory bowel disease or irritable bowel, therefore need to limit the amount of fructose consumed. Fructose empties from the stomach more rapidly than other sugars and is more slowly absorbed than glucose. When foods and beverages containing fructose as the dominant sugar are consumed, the capacity for fructose absorption in the small intestine can easily be exceeded. A study by Beyer et al. investigated the frequency of fructose malabsorption and gastrointestinal symptoms in normal healthy individuals using two doses of fructose (25 and 50 g). Fructose absorption was measured using three-hour hydrogen breath tests. Mean peak breath hydrogen, time of peak area under curve for breath hydrogen and gastrointestinal symptoms were measured and differences analysed. More than half of the 15 adults showed evidence of fructose malabsorption after 25 g and more than two-thirds after 50 g, indicating that commonly consumed amounts of fructose may result in mild gastrointestinal distress in normal individuals. Beyer, PL; Caviar, EM; McCallum, RW (2005). Fructose intake at current levels in the United States may cause gastrointestinal distress in normal adults. Journal of the American Dietetic Association, 105 (10) 1559-1565.

High fructose consumption and liver disease
While the rise in non-alcoholic fatty liver disease parallels the increase in obesity and diabetes, a significant increase in dietary fructose consumption in industrialized countries has also occurred. The increased consumption of high fructose corn syrup, primarily in the form of soft drinks, is linked with complications of the insulin resistance syndrome. Furthermore, the hepatic metabolism of fructose favors de novo lipogenesis and ATP depletion. Increased fructose consumption contributes to the development of non-alcoholic fatty liver disease.