How much weight could you loose eating 850 calories a day?

Answer 1

Weight loss depends upon many factors besides just caloric intake. Other factors are a persons metabolism (how fast they burn calories), their activity level, and their size, weight and body composition. Additionally, I think that the type of calorie and time of consumption also affect weight loss or gain.

850 calories consumed at one sitting and comprised of fatty foods is much more likely to cause weight gain than weight loss. However, 850 calories comprised of complex carbohydrates and lean protein spread over 4 or 5 meals will be more likely to result in weight loss.

Body composition also plays a role. Muscle tissue requires more calories to maintain than an equal amount of fat tissue. Everything else being equal, a very lean 160 pound person may require more calories to maintain his/her weight than a larger, but less muscled person.