2012;25(2) S Afr J Clin Nutr Cheserek MJ, MSc, Lecturer, Human Nutrition Department, Egerton University, Kenya Tuitoek PJ, PhD, Professor, Human Nutrition Department, Egerton University, Kenya Waudo JN, PhD, Professor, Department of Food Nutrition and Dietetics, Kenyatta University, Nairobi, Kenya Msuya JM, PhD, Professor, Department of Food Science and Technology, Home Economics and Human Nutr...