For example, the World Health Organization recommends keeping added sugar intake to 10% of total calories. For the average 2000 calorie-diet that's a maximum of 50 grams. The American Heart Association recommends 6 teaspoons of sugar for women and 9 for men (1 teaspoon of sugar has about 4g of sugar).
In developmental biology, cellular differentiation is the process by which a less specialized cell becomes a more specialized cell type. Different tissues have different kinds of cells.
In cell differentiation, a generic cell evolves into a specific cell type which actually is a response triggered by the cells themselves. This process allows the single celled zygote to evolve into multicellular adult organism constituting hundreds of various types of cells.