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There is a complex relationship between our mental health and what we eat. On the one hand, certain diets appear to increase the risk of developing a mental disorder. On the other hand, suffering from a mental disorder could lead to eating more or eating less, or eating different kinds of foods.
One particularly mysterious association is that between depression and being a vegetarian. While some studies showed that vegetarians are more depressed than meat-eaters, others showed the exact opposite.
A New Meta-Analysis on Vegetarianism and Depressed Mood
To unravel this mystery, a German research team (which