I cannot see how these diets work ?? they are not teaching the person to have a change they can sustain for life, which is what we all need.
Oh absolutely. I saw this guy a few weeks after he started on Lighter Life and he had, indeed, lost a lot of weight. He was a big lad - he had relentlessly gained weight at the rate of about a stone a year since getting married 7 years ago so there was plenty of, er, potential to lose. However, as you say, no-one can maintain that regime for any length of time - I imagine you'd ultimately starve to death on 550cals/day.