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The impact of soy protein isolate on the proteolysis and organoleptic properties of Cheddar‐type cheese during ripening was studied. Cheese was prepared from cow's milk (control) and cow's milk plus soy protein isolate by using a starter culture of Streptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus, and then ripened at 12 ± 1°C for 3 and 5 months. The molecular weight range and peptide fraction in the cheeses were determined by high‐performance liquid chromatography (HPLC), and the microstructure was observed by scanning electron microscopy (SEM). Sensory evaluation was used to compare the flavour, body, texture and appearance of the cheeses. The results show that the molecular weight range (9924–9966 Da) in the control cheese was larger than that (6954–6957 Da) in the soy protein‐treated cheese and the microstructure in the latter was less compact than in the control cheese. In the sensory evaluation, higher scores were given for some experimental cheese than the control cheese. After 5 months of ripening, the organoleptic properties of the cheese had markedly improved and no bitter off‐flavour was detected in the treated cheeses. It was concluded that soy protein could be used to improve the quality of cheese and the addition of 5% soy protein isolate could be recommended for improving the flavour and texture of Cheddar‐type soy supplemented cheese.

Olestra is a sucrose polyester, the first fat substitute that replaces many of the uses of dietary fat such as in dough conditioning, in sprays, in filling ingredients, in flavors, as well as in frying. However, it is not absorbed in the human digestive system, and therefore, it does not provide any nutrition or energy. It has taste and cooking properties similar to the conventional fats and oils. FDA approved the use of olestra only in limited and specific foods with a listing of fat soluble vitamins (vitamins A, D, E, and K) in the ingredient statement of olestra-containing foods followed by an asterisk that is linked to the statement "Dietarily insignificant." This article reviews the physiological, nutritional, health, and environmental effects of the human consumption of olestra.