The video below demonstrates the true cause behind most of the difficult Weight Loss cases - Psychological Reversal.

Technically speaking, Psychological Reversal is when the body' energy system changes polarity. To draw an analogy, it is something similar to putting the batteries of a remote control in reverse order. If you do so, irrespective of what you may do the remote would not function. Similarly, if you are psychologically reversed on a particular aspect (weight loss in this case) you would have a real tough time in losing weight inspite of what may do.