A randomized, controlled, parallel-arm controlled-feeding trial suggests positive effects of whole grains on resting metabolic rate (RMR) and stool energy excretion that favorably influence energy balance. The trial included 81 men and postmenopausal women [49 men and 32 women; age range: 40–65 y; body mass index <35.0]. Participants were randomly assigned to 2 weight-maintenance diets for 6 weeks. The whole grain–rich diet group (WG) consumed 207 ± 39 g whole grains plus 40 ± 5 g dietary fiber/d; the refined grain–based diet group (RG) consumed 0 g whole grains plus 21 ± 3 g dietary fiber/d. RMR, stool weight, and stool energy content were higher in the WG than the RG. When combined, the favorable energetic effects in the WG translated into a 92-kcal/d higher net daily energy loss compared with that of the RG. Prospective consumption and glycaemia after an oral-glucose-tolerance test trended toward being lower in the WG than in the RG. The findings help explain epidemiologic associations between whole-grain consumption and reduced body weight and adiposity. Source: http://ajcn.nutrition.org/
一项随机对照，平行饮食对照试验提示，全谷物对静息代谢率和大便能量排泄的积极作用有利于影响能量平衡。试验包括81名男性和绝经后妇女 [49名男性和32名妇女; 年龄范围：40-65岁; 体重指数<35.0]。参与者被随机分配到2种维持体重饮食6周。全谷物丰富饮食组食用207±39克全谷物+ 40±5克膳食纤维/天；精制谷物饮食组食用0克全谷物加21±3克膳食纤维/天。全谷物丰富饮食组静息代谢率，粪便重量和粪便能量含量均高于精制谷物饮食组。总之，与精制谷物饮食组相比，全谷物丰富饮食组的有利的能量效应相当于净日能量损失增加92-千卡/天。口服葡萄糖耐量试验后的前瞻性消耗和血糖水平均趋于在全谷物丰富饮食组中低于精制谷物饮食组。这些发现有助于解释全谷物消费与减少体重和肥胖之间的流行病学联系。来源：http://ajcn.nutrition.org/