When thinking about ways that can help us feel happier and more optimistic, physical activity, good sleep or mindfulness practices usually come to mind. However, it is possible that the food we eat also plays a role in supporting our psychological well-being.
Psychological well-being – A combination of a sense of happiness, optimism and a sense of meaning – Is not just a matter of feeling good. Studies indicate that it is also associated with better physical health and higher quality of life. Although nutrition alone is not a magic solution for mental health, researchers are examining how certain foods, especially those rich in flavonoids – Plant compounds with antioxidant and anti-inflammatory properties – May contribute to mental well-being over time.
A new study published in the journal Clinical Nutrition examined the possible connection between the consumption of flavonoid-rich foods and feelings of happiness and optimism. The study focused particularly on foods such as berries, citrus fruits and beverages such as tea and red wine, which are also rich in flavonoids, and examined whether their consumption may support psychological well-being over time.
How was the study conducted?
To examine whether flavonoid consumption is associated with psychological well-being, the researchers relied on data from the large Nurses’ Health Study, which includes information on more than 120 thousand nurses. This is one of the largest and most detailed studies of its kind, tracking for decades the health status of participants, their lifestyle and their dietary habits.
In the current analysis, the researchers focused on two groups of women. In one group, the level of happiness was measured over ten years, and in another group, the level of optimism was examined over a similar period.
The participants filled out detailed food frequency questionnaires once every four years, which allowed the researchers to calculate the consumption of flavonoid-rich foods – Including berries, citrus fruits, tea and red wine. In addition, the researchers created an index called "Flavodiet score", designed to measure the variety of flavonoid sources in the participants’ diet. The index was based on seven key foods: Tea, apples, oranges, grapefruits, blueberries, strawberries and red wine.
To improve the accuracy of the results, the researchers excluded participants who suffered from significant chronic diseases or those whose data were incomplete. Ultimately, more than 44 thousand women were included in the analysis to examine levels of happiness and nearly 37 thousand women to examine levels of optimism. In addition, the researchers took into account other factors that may affect the results, such as age, physical activity, smoking habits and overall diet quality.
What did the study find?
The study results indicated a moderate but significant link between a diet rich in flavonoids and maintaining high levels of happiness and optimism over time. Women who consumed the highest amount of flavonoid-rich foods – About three servings per day on average – Had a 3% higher likelihood of maintaining high levels of happiness and a 6% higher likelihood of maintaining levels of optimism over the study period, compared to women who consumed the lowest amount.
In addition, it was found that higher consumption of certain foods was associated with an even greater likelihood of maintaining a sense of happiness. Higher consumption of strawberries, blueberries, apples, oranges and grapefruits was associated with an increase of between 8% and 16% in the likelihood of maintaining high levels of happiness or optimism.
For example, women who ate the highest amount of strawberries had an 8% higher likelihood of reporting high levels of happiness, while women who consumed the highest amount of blueberries had a 14% higher likelihood of maintaining a sense of optimism over time.
It is interesting to note that although tea and red wine are also rich in flavonoids, they did not show the same strong connection found for fruits. The researchers estimate that this may be related to differences in the way the beverages are consumed or processed, or to variation in flavonoid content depending on preparation and storage methods.
Alongside the encouraging findings, the researchers emphasized that the study also has several limitations. First, most of the participants were white and educated women, so the results may not necessarily represent more diverse populations.
In addition, the study was based on data reported by the participants themselves, which may lead to errors in measuring diet or the level of psychological well-being. For example, participants may not have accurately remembered how often they ate certain foods or how they felt over time.
Another limitation is that the study cannot prove a clear causal relationship. Although the findings indicate a connection between diet and psychological well-being, it is possible that other factors – Such as socio-economic status or access to healthy food – Also influenced the results. Therefore, further studies are required, especially controlled clinical trials, to better understand the mechanisms behind this connection.
What is the meaning in everyday life?
For many people, increasing the consumption of flavonoid-rich foods may be a simple way to support both physical health and mental well-being. Berries, citrus fruits and green vegetables provide a wide range of essential nutrients, and at the same time may also be associated with a sense of happiness and optimism over time.
However, it is important to remember that nutrition is only one part of the overall picture of psychological well-being. Even if consuming flavonoid-rich foods can be a beneficial addition to a healthy lifestyle, it is not a substitute for medical or psychological treatment when it comes to conditions such as depression or anxiety.
In addition, the researchers emphasize that the benefits of flavonoids are likely related to a varied diet and not to a single food or specific dietary supplement. Therefore, it is recommended to incorporate a wide variety of fruits, vegetables and other flavonoid-rich foods into the daily menu.
For example, you can start the day with a bowl of oatmeal with blueberries and strawberries, eat an orange as a snack during the day and add green vegetables such as kale or spinach to dinner.
In conclusion, the study found that a diet rich in foods containing flavonoids – Such as berries, citrus fruits and apples – Was moderately associated with maintaining a sense of happiness and optimism over time. Women who consumed about three servings per day of these foods had a slightly higher likelihood of maintaining high levels of psychological well-being. However, it is important to remember that the effect found was moderate, and diet alone does not constitute treatment or a solution for psychological conditions.