Eating only apples for dinner, although helpful for weight loss, but long-term consumption of a single food, easy to lead to malnutrition.
The human body needs a variety of nutrients, if you only eat apples will lead to insufficient intake of other nutrients.
Secondly, after eating only apples for dinner and losing weight, the weight bounces back faster once you stop the program.
Plus, apples are slightly acidic, long-term consumption, easy to cause damage to the stomach and intestines, inducing gastritis.