Not every bad day, fatigue, or dip in mood is related to what we eat, and that is precisely why it is so important to beware of simplistic promises regarding the connection between nutrition and mental health. But in recent years, a growing field of research has been trying to understand how, how much, and why our food affects brain function, emotion, and also the familiar symptoms of complex mental health challenges.
A new study suggests that several basic dietary nutrients may be linked to a lower risk of depression symptoms. The study, published in the journal Nutritional Psychiatry, was based on data from the National Health and Nutrition Examination Survey in the United States (NHANES). The researchers analyzed information on 5,068 people aged 18 and older, which included two daily reports on their diet as well as a PHQ-9 questionnaire, a widely accepted tool for assessing depression symptoms in the two weeks prior to the examination. A score of 10 or higher on the questionnaire is generally considered an indicator of clinically significant symptoms, and in the current study, 9.1 percent of the participants met this threshold.
The researchers examined several nutrients, including fiber, folate, magnesium, selenium, zinc, and vitamins B6, B12, and D. After controlling for variables that might influence the results, such as age, sex, BMI, smoking, and total caloric intake, it was found that a higher intake of four nutrients was linked to the lowest likelihood of significant depression symptoms – Dietary fiber, folate, magnesium, and selenium.
Not a “magic supplement” but nutritional richness
The most prominent finding in the study was linked to folate. According to the researchers, every increase of one standard deviation in the consumption of this nutrient was linked to a 28 percent decrease in the likelihood of significant depression symptoms. In addition, participants who consumed the highest amount of folate had a 45 percent lower risk of depression symptoms compared to those who consumed the lowest amount. However, in more stringent analyses, the most consistent links were maintained mainly around fiber and folate, while the link with magnesium and selenium was less stable.
This message is particularly important because it does not focus on a single nutrient that is supposed to “solve” a complex problem. These four nutrients generally come from the same broad family of foods: Vegetables, legumes, whole grains, nuts, and seeds, so it is possible that the story is less about one specific nutrient or another and more about the overall quality of the menu.
How can this affect mood?
The current study was not designed to prove a biological mechanism or a cause-and-effect relationship, but the researchers did suggest several possible directions that could explain the results. Fiber nourishes gut bacteria and may influence the network of connections between the digestive system and the nervous system. Folate participates in processes necessary for the production of neurotransmitters like serotonin and dopamine, which are involved in mood regulation. Magnesium is linked to the regulation of nervous activity, and selenium participates in processes that protect the brain from damage by free radicals.
However, the researchers emphasize that this is not a recommendation to start taking supplements independently. Fujii said that the practical message is not to “chase supplements,” but to understand that diverse eating patterns, based on whole and natural food, can be relevant to improving mental health. One of the data points illustrating this is the average fiber consumption in the study, which stood at only 16.6 grams a day, well below the accepted recommendation of 25 to 38 grams a day.
And in any case, of course, diet alone cannot replace mental or medical treatment. But this study, like many others conducted on the subject, reminds us that improving the menu may also be part of the full picture. Those who want to apply the findings in a simple way do not need to calculate milligrams of selenium or magnesium, but rather to add more high-quality foods to their plate every day. So true, it is not a promise for a better mood, but it is another reason to treat nutrition as a more significant factor in all of our lives.
Source:
www.jpost.com
