title: Food processing methods influence the glycaemic indices of some commonly eaten West Indian carbohydrate-rich foods.
abstract: Glycaemic index (GI) values for fourteen commonly eaten carbohydrate-rich foods processed by various methods were determined using ten healthy subjects. The foods studied were round leaf yellow yam (Dioscorea cayenensis), negro and lucea yams (Dioscorea rotundata), white and sweet yams (Dioscorea alata), sweet potato (Solanum tuberosum), Irish potato (Ipomoea batatas), coco yam (Xanthosoma spp.), dasheen (Colocasia esculenta), pumpkin (Cucurbita moschata), breadfruit (Artocarpus altilis), green banana (Musa sapientum), and green and ripe plantain (Musa paradisiaca). The foods were processed by boiling, frying, baking and roasting where applicable. Pure glucose was used as the standard with a GI value of 100. The results revealed marked differences in GI among the different foods studied ranging from 35 (se 3) to 94 (se 8). The area under the glucose response curve and GI value of some of the roasted and baked foods were significantly higher than foods boiled or fried (P<0.05). The results indicate that foods processed by roasting or baking may result in higher GI. Conversely, boiling of foods may contribute to a lower GI diet.
authors.affiliation: Biotechnology Centre, University of the West Indies, Mona Campus, Kingston 7, Jamaica.
authors.forename: P S
authors.initials: PS
authors.lastname: Bahado-Singh
authors.forename: A O
authors.initials: AO
authors.lastname: Wheatley
authors.forename: M H
authors.initials: MH
authors.lastname: Ahmad
authors.forename: E Y St A
authors.initials: EY
authors.lastname: Morrison
authors.forename: H N
authors.initials: HN
authors.lastname: Asemota
mesh_terms: D000293:Adolescent; D000328:Adult; D031622:Artocarpus; D001786:Blood Glucose / Q000032:analysis; D017691:Caribbean Region; D031060:Colocasia; D003296:Cooking / Q000379:methods*; D028464:Cucurbita; D004040:Dietary Carbohydrates / Q000378:metabolism*; D027742:Dioscorea; D005260:Female; D005502:Food; D038321:Glycemic Index / Q000502:physiology*; D006801:Humans; D027723:Ipomoea batatas; D008297:Male; D028521:Musa; D011198:Solanum tuberosum; D031063:Xanthosoma
chemical_list: D001786:Blood Glucose; D004040:Dietary Carbohydrates