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Journal of Parenteral and Enteral Nutrition
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Essential Fatty Acid Status in Adult Patients Receiving Soybean-base Formula

Vichai Tanphaichitr, M.D., M.Sc. MED., PH.D.

Division of Nutrition and Biochemical Medicine, Departments of Medicine and Research Center, Faculty of Medicine, Ramathibodi Hospital, Bangkok, Thailand

Nitaya Tangchurat, M.S.

Division of Nutrition and Biochemical Medicine, Departments of Medicine and Research Center, Faculty of Medicine, Ramathibodi Hospital, Bangkok, Thailand

Essential fatty acid (EFA) status was assessed in 48 normal Thai adults and 6 patients who required tube feeding for 2-4 wk with commercial soybean-base formula (Sobel, Mead Johnson). Each 1000 kcal of this formula provided 40.2 g protein, 32.8 g fat, 136 g carbohydrate, 13.9 g linoleic acid, 2.9 g linolenic acid, and 0 g arachidonic acid. The linoleic acid status in these patients before receiving soybean-base formula was inadequate, as evidenced by the significantly lower serum 18:2-W6 percentage but higher serum 16:1-W7 and 18:1-W9 percentages than those in normal adults. These changes were reversed while receiving soybean-base formula. A significant positive correlation between linoleic acid intake and its serum level was demonstrated. There was a significant decrease in serum 20:4-W6 percentage while receiving soybean-base formula. This could be related to the absence of this EFA in the formula and suppression of biotransformation of 18:2-W6 to 20: 4-W6 in the presence of a significant amount of 18:3-W3. None of the patients had 20:3-W9 in the serum or developed scaly dermatitis throughout the study.

Journal of Parenteral and Enteral Nutrition, Vol. 5, No. 2, 106-109 (1981)
DOI: 10.1177/0148607181005002106
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