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Can fruits and vegetables reduce your risk of memory loss?

Researchers determined whether fruits and vegetables are the keys to unlock better memory skills and reduce the risk of memory loss.

Memory loss is often experienced as we age, with up to 40% of people 65 and older experiencing cognitive impairment. There are many health conditions that affect memory, such as depression, heavy smoking, sleep apnea, physical inactivity, type 2 diabetes, and high blood pressure.

Diet is also known to have an impact on brain health. Because diet affects your health in so many ways, researchers have conducted many trials to measure what diets are good for the brain. However, most did not last very long and did not look at data from a large number of people.

A US study recently published in Neurology has changed that. It measured the impact of including more leafy greens, vegetables, and berry fruits in the diet over a period of 20 years. They obtained their data from the Health Professionals Follow-up Study (HPFS), which used questionnaires to obtain data on diet for over 20 years. The study obtained data from almost 28,000 health professionals, all men, who were an average age of 51 in 1986 when the study began. At that time the men completed a questionnaire about their eating habits, medical history, and lifestyle.

This food frequency questionnaire covered how often and how much food they ate from nine categories, like leafy green vegetables, citrus fruits, and berry fruits. Every other year afterwards, they re-took the questionnaire until the end of the study. In 2008 and 2012 the participants completed a subjective cognitive function questionnaire. This questionnaire assessed the men’s memory skills. It was made up of questions like, “Do you have trouble remembering things from one second to the next?” and “Do you have more trouble than usual remembering recent events?”

Consumption of more vegetables and fruits associated with better memory skills

Researchers found that the more vegetables, fruit, and fruit juice the men consumed, the better their memory skills. Those that ate a lot of leafy green vegetables, vegetables high in carotenoids, and berry fruits lowered their risk of memory loss. Also, the men who drank more orange juice in their seventies scored better on the memory skills questionnaire.

Because of the significant link between orange juice consumption at older ages and better brain health, researchers recommend further study into the link between orange juice and preventing memory loss in the elderly.

Study did not measure memory skills at the beginning of the study

The study was limited by the fact that the participants were all male, they did not take the memory skill questionnaire at the beginning of the study in 1986, and the memory skill questionnaire was subjective. However, researchers are confident that study data provide enough evidence to demonstrate their results are valid.

It is empowering to know that by simply eating more fruits and vegetables, and drinking orange juice can lower the risk for memory loss. This study suggests that individuals can improve brain health by making a few simple diet changes that can pay off in the long run.

Written by Rebecca K. Blankenship, B.Sc.

References:

  1. Small GW. What we need to know about age related memory loss. BMJ. 2002;324(7352):1502-5.
  2. Yuan C, Fondell E, Bhushan A et al. Long-term intake of vegetables and fruits and subjective cognitive function in US men. Neurology. 2018:10.1212/WNL.0000000000006684. doi:10.1212/wnl.0000000000006684
Rebecca Blankenship BSc
Rebecca Blankenship BSc
Rebecca Blankenship is a freelance technical writer. She reviews, edits, and authors internal quality documentation required for regulatory compliance. She has twenty years experience in industrial pharma/medical device quality management systems and an honors BSc in chemistry. She is a natural born rule follower and enjoys applying this strength to help others be audit ready to meet regulatory requirements. She also loves learning about the latest scientific discoveries while writing for Medical News Bulletin. Her free time is spent as a full-time mom, encouraging can-do attitudes and cooperation in her three children.
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