When you are 20, 25, or even 30 years old, losing weight - if you have a desire and certain willpower - is easy. A week of the diet and extra pounds will melt away like smoke.
That would always be so. But alas. To lose even two kilograms with age is already a feat. Moreover, after forty years, people very often grow stout, even if they have not changed their diet or lifestyle. Why is it so unfair?