« Early treatment response as a predictor of ongoing weight loss in obesity treatment, British Journal of Health Psychology, November 2005. »
In this same study, we found that the quick change of habits is productive of a successful weight loss.
Habits are acquired through repetition as Pavlov as shown.
Usually within 4 and 21 days.
Habits are extinguished also between 4 and 21 days by stopping the repetition.
I will also say that tastes can be changed between 4 and 21 days.
The major obstacle : the psychological need to compensate with food, such as alcohol, drugs or cigarettes for emotional distress.