The Sandwich Ingredient to Skip

Before you slather that mayo on your sandwich, there’s something you should know: Mayonnaise is loaded with omega-6 fatty acids, and—unlike its cousin omega-3—getting too much omega-6 is bad for your intelligence. By looking at studies of the fatty acid profiles of women’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 mother’s milk turned out to be the strongest predictor of test performance. On the other hand, the amount of omega-6 fat in mother’s milk—fats such as linoleic acid that come from vegetable oils such as corn and soybean—predict lower test scores. In countries where mother’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.


Jessica E. Williams

Jessica is a fun-loving free spirit. She's a writer that covers all sorts of genres. In her spare time, she's enjoying her family and contemplating the deeper meaning of life.

No Comments Yet

Leave a Reply

Your email address will not be published.


Your locale for the best advice on
fashion, health, and beauty


Subscribe to our newsletter to get exclusive information on today's trends in fashion, beauty, and more!

By clicking submit, I authorize Think Glamor and its affiliated companies to: (1) use, sell, and share my information for marketing purposes, including cross-context behavioral advertising, as described in our Terms of Service and Privacy Policy, (2) supplement the information that I provide with additional information lawfully obtained from other sources, like demographic data from public sources, interests inferred from web page views, or other data relevant to what might interest me, like past purchase or location data, (3) contact me or enable others to contact me by email with offers for goods and services from any category at the email address provided, and (4) retain my information while I am engaging with marketing messages that I receive and for a reasonable amount of time thereafter. I understand I can opt out at any time through an email that I receive, or by clicking here.

Skip to content