New Research Links Healthy Dietary Changes to Better Mental Health

Improving your diet could improve symptoms of depression, states the new study

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New UK research has found that improving your diet could also improve symptoms of depression. Carried out by researchers at the University of Manchester, the new study looked at 16 randomised controlled trials with a total of 45,826 participants to investigate the association between making dietary improvements and symptoms of depression and anxiety.

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The Results

The findings, published in the journal Psychosomatic Medicine, showed that all types of dietary improvement, including those designed for weight loss, fat reduction or to increase nutrients, appeared to have an equally beneficial effect on reducing the symptoms of depression, even in those without diagnosed depressive disorders. Moreover, when dietary improvements were combined with exercise, the positive effect was even stronger.

However, the researchers could not determine a clear relationship between diet and anxiety, although they did find that those female participants who improved their diet appeared to benefit from even greater improvements for symptoms of both depression and anxiety. “The overall evidence for the effects of diet on mood and mental well-being had up to now yet to be assessed,” said study author Dr Joseph Firth. “But our recent meta-analysis has done just that; showing that adopting a healthier diet can boost people’s mood. However, it has no clear effects on anxiety.”

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Simple Changes

“The similar effects from any type of dietary improvement suggests that highly-specific or specialised diets are unnecessary for the average individual,” continued Dr Firth, “Instead, just making simple changes is equally beneficial for mental health. In particular, eating more nutrient-dense meals which are high in fibre and vegetables, while cutting back on fast foods and refined sugars appears to be sufficient for avoiding the potentially negative psychological effects of a ‘junk food’ diet.”

“We’re not yet sure why some of our data showed significantly greater benefits from diets for women. So more research is needed on this. And we also need to establish how the benefits of a healthy diet are related to improvements in mental health. It could be through reducing obesity, inflammation, or fatigue – all of which are linked to diet and impact upon mental health,” added Dr Firth.

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Fruits and Veggies

Another recent UK study, this time from the University of Leeds, also found that increasing fruit and vegetable intake could help boost mental well-being. After looking at data from more than 40,000 participants, the team found that eating just one extra portion of fruits and vegetables a day appeared to have an effect on mental well-being equivalent to completing around eight extra days of walking a month, defined as walking for at least 10 minutes at a time.


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