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Abstract

Determination of Glycaemic Responses of Low Fat Milk Incorporated with Whey Proteins and Oats Powder

Objective: Investigation of glycaemic responses of low fat milk, enriched with whey proteins.

Design: Randomized crossover study.

Participants: Healthy volunteers (n=11) including both sexes (6 males and 5 females), aged between 20 and 30 years and with a body mass index of 18.5-23.5.

Main outcome measures: Blood glucose concentrations at fasting and 30, 45, 60, 90, 120 min were measured following ingestion of; skimmed milk powder, incorporated with extra whey proteins and oats flour (4:1 ratio), containing 50 g of available carbohydrates. Glycaemic Index values were expressed as the average value of 11 subjects.

Results: GI for the prepared formulation was 12 ± 2 and the average peak reduction of compared to the standard (Glucose) was 37.7%. Proximate analysis of the product indicated a higher total protein content (36.08 ± 2.5%) compared to fresh milk powder (21.9 ± 2.7%) and very low fat content (4.34 ± 0.5%) compared to fresh milk powder (29.3 ± 2.1%).

Conclusions: Incorporation of whey powder have significantly reduced the Glycaemic index of milk (p<0.05). Although digestible carbohydrate content was increased by addition of oats and also being lower in fat; low GI milk powder formulations can be developed by incorporating whey proteins and cereal grains like oats.


Author(s):

Manokaran S, Jayasinghe MA, Senadheera AS, Gunathilaka SS, Kalina S, Chandrajith VG and Ranaweera KDS1



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