Journal
NUTRITION
Volume 89, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.nut.2021.111343
Keywords
Inflammation; Oxidation; Linoleic acid; alpha-Linolenic acid; omega-3 fatty acids; Coronary heart disease
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Replacing saturated fats with polyunsaturated fats is recommended to reduce the risk of coronary heart disease. Soybean oil, a leading edible oil consumed globally and in the US, has been shown to lower blood cholesterol levels without affecting inflammation or increasing oxidative stress. Health agencies emphasize the importance of consuming sufficient amounts of each type of fat rather than focusing on the omega-6 to omega-3 dietary ratio.
To reduce risk of coronary heart disease, replacement of saturated fats (SFAs) with polyunsaturated fats (PUFA) is recommended. Strong and concordant evidence supports this recommendation, but controversy remains. Some observational studies have reported no association between SFAs and coronary heart disease, likely because of failure to account for the macronutrient replacing SFAs, which determines the direction and strength of the observed associations. Controversy also persists about whether n omega-6 (n omega-6) PUFA or a high dietary ratio of n omega-6 to omega-3 (n omega-3) fatty acids leads to proinflammatory and pro-oxidative states. These issues are relevant to soybean oil, which is the leading edible oil consumed globally and in the United States. Soybean oil accounts for over 40% of the US intake of both essential fatty acids. We reviewed clinical and epidemiologic literature to determine the effects of soybean oil on cholesterol levels, inflammation, and oxidation. Clinical evidence indicates that soybean oil does not affect inflammatory biomarkers, nor does it increase oxidative stress. On the other hand, it has been demonstrated that when dietary SFAs are replaced with soybean oil, blood cholesterol levels are lowered. Regarding the n omega-6 n omega-3 dietary ratio, health agencies have consistently rejected the importance of this ratio, instead emphasizing the importance of consuming sufficient amounts of each type of fat. Thus, several lines of evidence indicate that soybean oil can positively contribute to overall health and reduction of risk of coronary heart disease. (C) 2021 The Author(s). Published by Elsevier Inc.
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