Across all these popular diets, one pattern stands out. Weight gain happens when people consistently consume more calories than they burn. Weight loss happens when they eat fewer calories over time.
The best healthy diet is one that you can maintain, provides enough nutrients, limits processed foods, and supports stable energy.
Before starting a new diet, consider your own health history, any chronic disease, and whether the eating pattern fits your lifestyle. Sustainable changes often outperform diet fads when it comes to lasting weight loss and overall health.
We created this article in conjunction with AI technology, then made sure it was fact-checked and edited by a HowStuffWorks editor.