If you are on a diet and trying to restrict calories to 1,500 or fewer a day, this shake will pretty much count as a meal's worth of calories.
The Sun
If you restrict calories and undereat, it lowers the metabolism and causes a loss of muscle tissue, making it really hard to get a toned body.
Times, Sunday Times
They lost almost twice as much weight as people following a diet that simply told them to restrict calories to 1,400 per day.
Times, Sunday Times