Expatriates trying to become healthier in order to avoid making claims on international health insurance policies should not engage in new year diets.
Nutritionist and founder of the Cory Holly Institute Dr Cory Holly called this weight-loss concept "illogical, irrational and ridiculous".
Internationally, millions of individuals will use January 1st to attempt to change their eating habits and will fail, but they often continue attempting to diet over the next years, he pointed out.
The nutritionist said people should "absolutely not" follow in their footsteps and ought to base their eating patterns on biology and other principles based in reality.
"Use science as a guide, not mysticism or superstition," Dr Holly remarked.
His comments reflect those of non-diet weight loss expert and owner of The Enlighten Programme Roz Watkins, who said faddy eating habits make people fat, but advised men and women to limit their intake of sugar and stop eating when they feel full.