Natural Health Advisory

Your brain is mostly fat, 60% of which is the omega-3 DHA (docosahexaenoic acid). It’s too bad most of us don’t eat enough DHA containing foods or realize that taking a DHA supplement can boost our brain’s ability to function at its best. That is exactly what a recent study showed: healthy, young adults who took an omega 3 DHAsupplement saw significant improvements in memory and reaction times, according to findings published in the American Journal of Clinical Nutrition.[1]

What is DHA?

DHA is one of the two most important omega 3 fats and is absolutely critical for proper brain function. Our brains need DHA and its companion omega 3 fat, EPA (eicosapentaenoic acid), to work. Today’s only real food sources of these fats are wild fish and game, seaweed, algae, and eggs hatched from chickens fed only flaxseeds and fish meal. Low levels of these fats have been linked to everything from learning disabilities, to mental illness, and to dementia.

6 months of DHA supplementation improves memory

Many studies have looked at whether DHA supplementation improves these different brain conditions. In the recent study, researchers from Universities in New Zealand and the United Kingdom teamed upto investigate whether a DHA supplement improves cognitive performance in healthy young adults. They recruited 176 healthy adults between the ages of 18 and 45 to participate in their randomized, placebo- controlled, double-blind study.

About 1 gram of DHA a day is all that was needed to improve memory and reaction times

The subjects were randomly assigned to take either take DHA supplements (a total of 1.16 grams per day of DHA) or placebo for 6 months. They were administered a variety of different cognitive tests to assess their cognitive performance in terms of episodic memory (memory of events that took place back in time), working memory (short-term memory), reaction times of episodic and working memory, attention, and processing speed.

What they found was that DHA supplements improved memory and reaction times. For the general group, DHA mostly improved reaction times of episodic and working memory. The results were somewhat different in women and men. Women showed the greatest improvements in episodic memory while men showed the greatest improvements in reaction times of working memory. For instance, reaction times for men improved by 20%, meaning that they were able to complete working memory tasks 20% faster compared to men in the placebo group.

How to get enough DHA to improve your memory

The researchers noted that like most people, all the participants had habitual diets that were low in DHA to start with. It is not clear whether the same cognitive benefits would be observed in those whose diets were already high in DHA. For now, we know that about 1 gram per day of DHA in supplement form is beneficial for those who don’t eat a lot of fish, wild game, and seaweed in their diets. Look at the label on your brand of fish oil to determine how many capsules are needed to achieve this 1 gram (1000 mg) amount of DHA you’ll need to get the benefits.

Fats are important, but other nutrients can improve memory, too

The type of fats we consume and the quantities of those fats each plays a large role in our brains ability to function optimally. For an in-depth look at exactly how fats and other nutritional factors influence memory and cognitive function, you won’t want to miss our newly released comprehensive guide to fighting memory loss and brain fog, available here.

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[1] Am J ClinNutr. 2013 May;97(5):1134-43.

Originally published in 2013, this blog has been updated.

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