Data has indicated that gluten-free (GF) foods are more expensive and have lower nutritional value than their gluten-containing (GC) counterparts. The aim of the present study was to compare the cost and nutrient content between GF and GC staple foods and determine whether the number and price of GF staple foods differed based on type of store or location within Winnipeg, Canada. Twelve grocery stores (2 chain stores/quadrant;1 local store/quadrant) in the four quadrants (northwest, northeast, southwest, southeast) of Winnipeg were visited to identify GF staple products (bread, flour, cereal, pasta) along with a GC comparator. A total of 819 GF products along with GC comparators were identified. The median cost of GF products ($1.50/100 g) was 131 % greater than that of GC ($0.65/100 g) (p < 0.0001). The greatest difference in cost was between GF and GC flour, with the least difference occurring between GF and GC cereal. GF products were 58, 36 and 100 % lower in iron, protein and saturated fat (p < 0.0001) than their GC comparators, respectively. The number of GF staple products was 370 % higher (p < 0.007) at chain stores than at local stores, whereas store location did not significantly affect the number of GF products available. The greatest difference in number of different GF foods based on store type was for cereals, with the least being for flours. These results confirm that GF staple foods are more expensive and have lower nutritional value (mainly due to lower iron and protein content) compared to GC foods.

数据表明，不含麸质的食物比含麸质的食物更昂贵，营养价值也更低。本研究的目的是比较GF和GC主食之间的成本和营养成分，并根据加拿大温尼伯市内的商店类型或位置确定GF主食的数量和价格是否有所不同。访问了温尼伯四个象限（西北，东北，西南，东南）中的12个杂货店（2个连锁店/象限； 1个本地商店/象限），以识别GF的主要产品（面包，面粉，谷物，面食）以及GC比较器。总共鉴定出819种GF产品以及GC比较剂。GF产品（$ 1.50 / 100 g）的中位数成本比GC（$ 0.65 / 100 g）的中位数成本高131％（p <0.0001）。成本差异最大的是GF和GC面粉之间的差异最小，而GF和GC谷物之间的差异最小。GF产品的铁，蛋白质和饱和脂肪含量 分别比其GC比较产品低58、36和100％（p <0.0001）。 连锁店的GF短纤产品数量比本地商店高370％（p <0.007），而商店的位置并没有显着影响可用的GF产品的数量。根据商店类型的不同，GF食品数量差异最大的是谷物，而面粉的差异最小。这些结果证实，与GC食品相比，GF主食更昂贵且营养价值较低（主要是由于铁和蛋白质含量较低）。