a1 Rowett Research Institute Greenburn Road, Bucksburn, Aberdeen AB21 9SB UK
a2 Rowett Research Institute Biomathematics and Statistics Scotland, Bucksburn, Aberdeen AB21 9SB UK
An increased consumption of fruits and vegetables (F&V) has been suggested as a way to limit, or even lower, energy and fat intakes. The present study examined the effects of incorporating F&V supplements into the diets of adults who reported consuming <240g (three portions) of F&V per d on energy and fat intakes, and change in body weight, over 8 weeks using a randomised parallel design. Thirty-four males and twenty-eight females (age 42·6 (sd 11·1) years, BMI 23·7 (sd 2·7) kg/m2) were each provided with supplements of 0, 300 or 600g F&V per d. Food, nutrient and energy intakes were measured before, during and at the end of the supplementation period using 7 d weighed records. Mean daily energy intakes were not different among the three groups before (P=0·151) or during the supplementation periods (P=0·407), although changes in energy intakes over the study period tended to be more positive with increasing amounts of F&V supplements (P=0·078). There was no difference in changes of body weights during the study (P=0·242). Carbohydrate (P<0·001), sugar (P<0·001), fibre (P<0·001) and weight of food consumed (P=0·022) increased in the treatment groups. There were no significant differences, or changes, in fat intakes among the three groups. Consumption of mandatory F&V supplements for 8 weeks produced beneficial changes in diet composition, but did not result in lower reported energy or fat intakes, and did not result in loss of body weight.
(Received March 01 2004)
(Revised March 21 2005)
(Accepted March 22 2005)