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BACKGROUND	Dietary patterns characterized by high intakes of fruits and vegetables , whole grains , low-fat dairy products , and low glycemic load have been associated with lower type 2 diabetes mellitus ( T2DM ) risk .
BACKGROUND	In contrast , dietary patterns that include high intakes of refined grains , processed meats , and high amounts of added sugars have been associated with increased T2DM risk .
OBJECTIVE	This randomized , 2-period crossover trial compared the effects of dairy and sugar-sweetened product ( SSP ) consumption on insulin sensitivity and pancreatic - cell function in men and women at risk of the development of T2DM who habitually consume sugar-sweetened beverages .
METHODS	In a randomized , controlled crossover trial , participants consumed dairy products ( 474 mL/d 2 % milk and 170 g/d low-fat yogurt ) and SSPs ( 710 mL/d nondiet soda and 108 g/d nondairy pudding ) , each for 6 wk , with a 2-wk washout between treatments .
METHODS	A liquid meal tolerance test ( LMTT ) was administered at baseline and the end of each period .
RESULTS	Participants were 50 % female with a mean age and body mass index of 53.8 y and 32.2 kg/m ( 2 ) , respectively .
RESULTS	Changes from baseline were significantly different between dairy product and SSP conditions for median homeostasis model assessment 2-insulin sensitivity ( HOMA2 - % S ) ( 1.3 vs. -21.3 % , respectively , P = 0.009 ; baseline = 118 % ) , mean LMTT disposition index ( -0.03 vs. -0.36 , respectively , P = 0.011 ; baseline = 2.59 ) , mean HDL cholesterol ( 0.8 vs. -4.2 % , respectively , P = 0.015 ; baseline = 44.3 mg/dL ) , and mean serum 25-hydroxyvitamin D [ 25 ( OH ) D ] ( 11.7 vs. -3.3 , respectively , P = 0.022 ; baseline = 24.5 g/L ) .
RESULTS	Changes from baseline in LMTT Matsuda insulin sensitivity index ( -0.10 vs. -0.49 , respectively ; baseline = 4.16 ) and mean HOMA2 -- cell function ( -2.0 vs. 5.3 % , respectively ; baseline = 72.6 % ) did not differ significantly between treatments .
CONCLUSIONS	These results suggest that SSP consumption is associated with less favorable values for HOMA2 - % S , LMTT disposition index , HDL cholesterol , and serum 25 ( OH ) D in men and women at risk of T2DM vs. baseline values and values during dairy product consumption .
CONCLUSIONS	This trial was registered at clinicaltrials.gov as NCT01936935 .

