Before you slather that mayo on your sandwich, thereâ€™s something you should know: Mayonnaise is loaded with omega-6 fatty acids, andâ€”unlike its cousin omega-3â€”getting too much omega-6 is bad for your intelligence.
By looking at studies of the fatty acid profiles of womenâ€™s breast milk, researchers at UC Santa Barbara and the University of Pittsburgh examined the estimated content of omega-3 docosahexaenoic acid DHA (fat primarily found in certain fish, nuts and seeds, which makes up a large portion of our brains) and linoleic acid (the main source of omega-6 fatty acids) in diets of women living in 50 countries.
The researchers found a couple of interesting things: The amount of DHA in a motherâ€™s milk turned out to be the strongest predictor of test performance.
On the other hand, the amount of omega-6 fat in motherâ€™s milkâ€”fats such as linoleic acid that come from vegetable oils such as corn and soybeanâ€”predict lower test scores.
In countries where motherâ€™s diets contain more omega-6, the beneficial effects of DHA seem to be reduced. For your next sandwich, try avocado or black bean spread instead.-Youbeauty