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Improved Diet Can Ease Depression Symptoms, Enhance Mood

A new study provides evidence that dietary improvement significantly reduces symptoms of depression and improves mood, even in people without diagnosed depressive disorders. A healthier diet improved mental health more so in women than men, but did not have a effect on anxiety for either gender.

Dr. Joseph Firth and colleagues from the University of Manchester and Western Sydney University crafted a novel research strategy that combined existing data from clinical trials of diets for mental health conditions. In their analysis of almost 46,000 people, they discovered weight loss, nutrient boosting and fat reduction diets can all reduce the symptoms of depression.

The study appears in the journal Psychosomatic Medicine.

“The overall evidence for the effects of diet on mood and mental well-being had up to now yet to be assessed,” Firth said. “But our recent meta-analysis has done just that; showing that adopting a healthier diet can boost peoples’ mood. However, it has no clear effects on anxiety.”

The study combined data from 16 randomized controlled trials that examined the effects of dietary interventions on symptoms of depression and anxiety.

Sixteen eligible trials with outcome data for 45,826 participants were included; the majority of which examined samples with non-clinical depression.

The study found that all types of dietary improvement appeared to have equal effects on mental health, with weight-loss, fat reduction or nutrient-improving diets all having similar benefits for depressive symptoms.

“This is actually good news,” said Firth; “The similar effects from any type of dietary improvement suggests that highly-specific or specialized diets are unnecessary for the average individual.

“Instead, just making simple changes is equally beneficial for mental health. In particular, eating more nutrient-dense meals which are high in fiber 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.

Dr. Brendon Stubbs, co-author of the study and Clinical Lecturer at the NIHR Maudsley Biomedical Research Centre and King’s College London, said, “Our data add to the growing evidence to support lifestyle interventions as an important approach to tackle low mood and depression.

“Specifically, our results within this study found that when dietary interventions were combined with exercise, a greater improvement in depressive symptoms was experienced by people. Taken together, our data really highlight the central role of eating a healthier diet and taking regular exercise to act as a viable treatment to help people with low mood.”

Studies examined with female samples showed even greater benefits from dietary interventions for symptoms of both depression and anxiety.

Source: University of Manchester



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