Walnuts appear to improve a number of risk factors for heart disease. This may be due to their high content of ALA and other nutrients.
A number of large studies have found that eating walnuts significantly reduced total cholesterol and LDL cholesterol, while increasing "good" HDL cholesterol (31, 32, 33).
Walnuts may also improve other factors related to heart health, including blood pressure and the normal flow of blood through the circulatory system (34, 35).
In addition, walnuts may help reduce inflammation, which can contribute to many chronic diseases (36).
Interestingly, a study in college students found that eating walnuts increased a measure of cognition called "inferential reasoning," suggesting that walnuts may have beneficial effects on the brain (37).
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