What is the Dukan diet fad?

The Dukan Diet is a high-protein low-carbohydrate fad diet devised by Pierre Dukan. The Dukan diet is a high-protein, low-carbohydrate diet with four phases, each of which has specific rules. The Dukan diet is categorized as a commercial fad diet and carries some risk of causing chronic kidney disease and worsened cardiovascular health. It is unclear whether it helps people lose weight or increase their glucose tolerance. Nephrolithiasis is a potential side effect of the diet that is of particular concern to people with a history of kidney stone formation. The British Dietetic Association have named the Dukan Diet the number 1 "diet to avoid".