What are examples of man-made edible colloids?

* Jelly: Jelly is made from gelatin, a protein derived from collagen. When gelatin is dissolved in hot water, it forms a sol. When the sol is cooled, the gelatin molecules aggregate and form a gel.

* Mayonnaise: Mayonnaise is made from oil, vinegar, and egg yolks. The egg yolks contain lecithin, an emulsifier that helps to keep the oil and vinegar from separating.

* Salad dressing: Salad dressing is made from oil, vinegar, and other ingredients such as herbs, spices, and sweeteners. The oil and vinegar are emulsified by the other ingredients.

* Whipped cream: Whipped cream is made from heavy cream that has been beaten until it becomes fluffy. The air bubbles in the whipped cream act as a colloidal stabilizer.

* Ice cream: Ice cream is made from milk, cream, sugar, and flavorings. The milk and cream contain proteins and fats that act as colloidal stabilizers.