Practically every weight loss website out there has at least one (or one dozen) 1,200-calorie-a-day diet option. Even the National Institutes of Health has published a 1,200-calorie-a-day meal plan.

To follow a low-calorie diet as safely as possible ... When carefully planned, a 1,200-calorie menu includes sufficient protein to minimize any muscle you might naturally lose on a fast weight-loss ...

This involves replacing all foods with specially formulated products such as soups, shakes and cereal bars, providing between 800–1200 calories per day. Only follow a very low calorie diet if a ...

brands itself as different from a regular diet, according to ads, using psychology to help customers change their lifestyle. But the app's default recommendation of 1,200 calories a day for many ...