Quite right on "Only a tiny imbalance is enough for a person to get overweight". Quick mental experiment: say I overeat 1 apple per day, that's ~ 90 kcal, that'

Quite right on "Only a tiny imbalance is enough for a person to get overweight". Quick mental experiment: say I overeat 1 apple per day, that's ~ 90 kcal, that's ~= 10 grams of fat x 365 days == that's 3.65 kg per year. Over a course of only 10 years, that's extra 36.5 kg of weight I'd put on! From an imbalance of only 1 apple per day.