There was interaction by food source , with specific food sources showing beneficial effects ( fruit and fruit juice ) or harmful effects ( sweetened milk and mixed sources ) in substitution studies and harmful effects ( sugars‐sweetened beverages and fruit juice ) in addition studies on at least one outcome .
Conclusions Energy control and food source appear to mediate the effect of fructose‐containing sugars on glycaemic control .
Although most food sources of these sugars ( especially fruit ) do not have a harmful effect in energy matched substitutions with other macronutrients , several food sources of fructose‐containing sugars ( especially sugars‐sweetened beverages ) adding excess energy to diets have harmful effects .
Objective To assess the effect of different food sources of fructose‐containing sugars  on glycaemic control at different levels of energy control .
Walking Reduces Postprandial Insulin Secretion in Obese Adolescents Consuming a High-Fructose or High-Glucose Diet.
BACKGROUND This study assessed if walking at a self-selected pace could improve postpr and ial glucose and insulin concentrations in obese adolescents consuming high-fructose ( HF ) or high-glucose ( HG ) diets . METHODS Seven obese male and female adolescents ( 18 ± 1 yr ) performed 4 , 15-day trials in a r and om order , including 1 ) HF-diet ( 50 g fructose/d added to normal diet ) while being sedentary , 2 ) HG-diet ( 50 g glucose/d ) while sedentary , 3 ) HF-diet with additional walking , and 4 ) HG-diet with additional walking . On the 15th day of each trial , the participants performed mixed meal testing in the laboratory in which they consumed three liquid shakes ( either HF or HG ) and during the HF and HG sedentary trials , the participants took < 4000 steps while in the laboratory but during the walking trials took ≥ 13,000 steps during testing . RESULTS Walking did not alter postpr and ial glucose concentrations . Although walking reduced insulin secretion by 34 % and 25 % during the HF- and HG-diet , respectively ( P < .05 ) , total insulin concentrations were only significantly reduced ( P > .05 ) with walking during the HF trial , possibly because walking enhanced insulin clearance to a greater extent during the HF-diet . CONCLUSIONS Walking reduces postpr and ial insulin secretion in obese adolescents consuming a high-fructose or high-glucose diet
There was interaction by food source , with specific food sources showing beneficial effects ( fruit and fruit juice ) or harmful effects ( sweetened milk and mixed sources ) in substitution studies and harmful effects ( sugars‐sweetened beverages and fruit juice ) in addition studies on at least one outcome .
Conclusions Energy control and food source appear to mediate the effect of fructose‐containing sugars on glycaemic control .
Although most food sources of these sugars ( especially fruit ) do not have a harmful effect in energy matched substitutions with other macronutrients , several food sources of fructose‐containing sugars ( especially sugars‐sweetened beverages ) adding excess energy to diets have harmful effects .
Objective To assess the effect of different food sources of fructose‐containing sugars  on glycaemic control at different levels of energy control .