What vegan and vegetarian diets can and can’t tell us about eating disorders - The Conversation

What the report says

The Conversation Africa reports that a new systematic review and meta-analysis found no clear overall difference in eating disorder symptoms between people following strict vegetarian or vegan diets and those who eat meat. The review covered 24 studies with 25,223 participants and used established questionnaires that measure reported symptoms such as food restriction, loss of control while eating, and concerns about weight or body shape. The authors stressed that these tools did not confirm clinical diagnoses.

The review applied narrow diet definitions: vegetarians were classed as excluding meat, poultry, fish and seafood, while vegans excluded all animal-derived foods. Flexitarian, pescatarian and semi-vegetarian diets were left out. Individual studies varied, with some showing more symptoms among vegetarians or vegans, some showing fewer, and others showing no clear difference. When combined, the findings did not show a meaningful overall gap between groups.

A key point in the article is that motivation may matter more than the diet label. The authors noted that someone may avoid meat for ethical, religious, environmental or health reasons, while another person may restrict foods because of fear of weight gain. Only a small number of studies examined motivation, and one university student study linked weight-control reasons for adopting vegetarian diets with more eating disorder symptoms.

The Conversation Africa also highlighted limits in the evidence. All studies were cross-sectional, most were from western countries, many participants were women, and there was limited information on diet quality, duration or reasons for the diet. The authors concluded that vegetarianism or veganism should not be treated as a warning sign by itself; concerns should focus on distress, increasing restriction, nutritional adequacy and the reasons behind dietary change.