Seven of the included vegetarian studies looked specifically at vegan diets, and each of them had a control group. Vegan diets are becoming increasingly popular.
They claim to offer various health benefits, ranging from weight loss and reduced blood sugar to prevention of heart disease, cancer and premature death.
However, most studies on vegan diets are observational. This makes it difficult to know if the benefits observed are actually caused by the vegan diet itself.
This article analyzes 16 randomized controlled studies — the gold standard in scientific research — to evaluate how a vegan diet can affect your health.