Studies included in the summary table were specifically clinical trials providing fructose alone in at least one arm with breath testing, and were conducted in adults, either healthy or with compromised gut function.
The ΔACIAD1925 mutant could not be obtained on succinate-supplemented minimal media, reflecting the fact that Fda is required in the gluconeogenesis pathway to provide fructose-1,6-bisphosphate, an essential intermediate for building pentose-phosphates and polysaccharides.
In a randomized controlled trial, Shepherd et al. (2008) provided a fructose beverage with meals throughout the day, but did not incorporate breath testing.
For the final 2-wk inpatient intervention period, subjects consumed diets at the baseline energy level and macronutrient composition except that 30% of energy was from complex carbohydrates and 25% was provided by fructose- or glucose-sweetened beverages.
In humans, short-term overfeeding with 20 to 30% extra energy provided as fructose leads to a slight increase in fasting plasma glucose, and to a moderate (approximately 10%) increase in fasting glucose production, indicating some impairment of hepatic insulin sensitivity.
There are other difficulties in the United States, where Tate & Lyle gets the lion's share, or 38% of its profits, thanks to a weakening demand for soft drinks like Coca-Cola and Pepsi, for which Tate & Lyle provides high fructose sweeteners.
This highlights the danger of providing more fructose sweetened beverages to patients who receive gentamicin therapy.
In growing internodes of the axillary branch of sorghum, the tritium label initially provided in the fructose moiety of sucrose molecules was largely (81%) recovered in the fructose moiety, indicating that a large portion of sucrose molecules is not hydrolysed and resynthesized during radial transfer.
However, the energy provided by the fructose and glucose beverages in their study accounted for 25% of total energy intake.
