Common misconceptions about weight loss diets include the belief that all calories are equal and that drastically reducing caloric intake is the best approach. Many assume that carbohydrates should be completely avoided or that fat-free products are healthier, while in reality, not all calories provide equal nutrients. Additionally, some people think that weight loss can be achieved solely through dietary changes, ignoring the importance of exercise. Lastly, the idea that weight loss can happen quickly leads to unsustainable practices, ultimately resulting in weight regain.