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.
Differentiation results in the presence of cell types that have clear-cut identities, such as muscle cells, nerve cells, and skin cells. Differentiation results from differential gene expression: The specific components of a given cell provides its special characteristics.