A single slice of white bread (25g) has just 68 calories, with 2.4g protein and 12.3g carbs, according to USDA FoodData Central. That is less than a medium banana. Bread is one of the most misunderstood foods in weight loss. People demonize it, cut it out entirely, then binge on it a week later.
The real question is not whether bread is "bad" — it is what type you pick, how much you eat, and what you put on it. Here is a complete breakdown using USDA data.