Most of us have grown up in a culture of fad dieting; think Atkins, Cabbage Soup, and support groups with the “biggest loser” being clapped in each week.
All these diets have one thing in common—they promote restriction. Restriction may well lead to a reduction in body weight, but it also leads to a lack of energy, irritability, and a shortfall of vital nutrients. Fad diets use the number on the scales as the most important a marker of success, above all other health markers such as blood pressure, cholesterol levels, energy levels, muscle mass, and even psychological wellbeing.
https://www.readersdigest.co.uk/health/wellbeing/how-to-lose-weight-on-a-plant-based-diet