Vegans don’t eat meat, fish, eggs, dairy, or any other products that come from animals. Instead, they eat food like fresh fruits and vegetables, beans and legumes, as well as plant-based kinds of milk, other nondairy products, and meat alternatives. This contributes to weight loss by cutting out many of the known high-fat products and opting for healthy alternatives.
Vegan diets are a proven way to lose weight, although there is still some inconclusiveness over the data. Vegetarian diets have significant benefits on weight reduction compared to non-vegetarian diets, but long-term weight control and vegan diets have not been studied conclusively. The most effective diets are those that cut out processed, high-calorie, and fatty foods. This is precisely what a vegan diet does. A vegan diet is also the most restrictive diet along these metrics, so it makes sense that it would be the best way to lose weight. Vegan diets are also typically high in fiber and low in saturated fat, both of which are needed to promote weight loss. Fiber keeps us satiated and full until our next meal, and also helps prevent the temptation to snack. It regulates our blood pressure, keeps cholesterol levels low, and even boasts anti-inflammatory properties. Rather than saturated fats, vegan diets emphasize heart-healthy unsaturated fats and "good" carbohydrates, allowing for a higher intake of antioxidants, vitamins, and minerals than the standard American diet. The vegan diet checks all the boxes when it comes to triggering weight loss in the body. So long as an individual is not adding calories with processed foods, the vegan diet will likely produce the most weight loss.