In a new study published in Psychosomatic Medicine, a team of researchers brought together all existing data from clinical trials of diets for mental health conditions.
"The overall evidence for the effects of diet on mood and mental well-being had up to now yet to be assessed. 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," said Joseph Firth, lead researcher of the study.
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 on depressive symptoms.
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"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,” he asserted.