Because if consume too much, it can cause many diseases, such as diabetes which damages one person's health....

Here, people are taught to eat or drink less sugar- or fructose-added foods and drinks. See attached table. It shows how much white sugar in a can of a specific drink.

Thanks Dr. Yuan-Yeu Yau

Thanks Dr. Jakob Leskovec

High sugar in diet leads to many diseases among them is diabetes meliteus, which is serious disease that affect on all body system. Our prophet Mohamed peace up on him tell us to avoid much sugar and salt

If possible point out the natural food, fruits and others having less sugar and high fructose content for eating & drinkings.

High sugar levels could alter basic metabolic activities

This link is very useful

https://recipes.timesofindia.com/articles/food-facts/7-reasons-why-sugar-is-called-the-white-death/affects-muscle-protein/photostory/60388572.cms

Very important

Sugar Is Called “The White Death”

Glucose metabolite glucose 6-phosphate (G6P) that was responsible for the changes in the muscle protein of the heart. These changes could eventually lead to heart failure..A 2008 study found that excess fructose consumption was linked to an increase in a condition called leptin resistance.

A 2009 study found a positive relationship between glucose consumption and the aging of our cells. Because bad bacteria love to eat sugars, sugar can depress your immune system by fueling the bad guys, just as eating yogurt and other fermented foods help feed the “good guys” with probiotics. Sugar increases the concentration of bile acids in stool and bacterial enzymes in the colon, which can modify bile to produce cancer-causing compounds and colon cancer.