Excess sugar harm. WHO guidelines
Harm from excess sugar consumption is well documented in scientific literature. The WHO’s March 2015 published guidelines recommend limiting daily calorie consumption by 10%, trying to halve it, without exceeding 25 gm a day (6 tablespoons), equal to 5% of daily calories. Just one fizzy drink crosses this threshold.
As well as dental decay, excessive sugar harm concerns being overweight, obesity and other, linked pathologies that cannot be passed on (high colesterol, heart disease): these are the main causes of death (68% of total in 2012) and fruit of the deadly mix of bad food and no physical activity.
The WHO refers to plain sugar, additives to sweeten food, and not the sugar naturally contained in fruit and vegetables, which cause no health risk for most people.