Starting a diet, learn these 4 scientific facts

First lesson: 

You can’t outrun your fork.

Controversy over Exercise can maintain weight loss  link

Second lesson: 

Best bang for health is 20 minutes walk/d

Book by Gretchen Reynolds NYT reporter   link

Third lesson: 

Weight loss 6-9 months.

 Any diet you want. 
Graphs showing that diet, surgery and pills fail at plateau link
Fourth lesson: 

 Weight loss maintenance for life with new diet medications. 

The four new diet medications link

Warning from Obesity Research Physician :

Diet Programs Bilking Public about long term efficacy  video