The Sandwich Ingredient to Skip

Too much mayonnaise could be bad for your intelligence.

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.


READ MORE: Why Mayo is So Unhealthy

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  • artist

    it is incredibly easy to make mayo with a stick blender with avocado oil or “light” not extra virgin olive oil!
    Just put 2 TBS lemon juice
    1/2 tsp sea salt
    1/2 tsp dry mustard
    1 egg
    1/4 cup avocado or light olive oil in a mason jar or the tall cup provided with most stick blenders. Whirrrrr
    add another cup oil and with blender at bottom zap it for about 30 seconds, raising the stick blender till all oil is incorporated about another 20 seconds. Done, flawless fresh healthy mayo.
    You can thin with more lemon or lime juice , sriracha, add garlic, spices whatever you like.

    Just avoid store-bought mayo made with industrial vegetable oils or soy!