A food gelling agent is a substance that is used to thicken or solidify food. The most common food gelling agent is AGAR, which is a type of polysaccharide derived from red algae. AGAR is odorless and flavorless, and is used in a variety of dishes, including desserts, jams, and jellies. It is also used as a thickener in soups and sauces. AGAR is a vegan-friendly alternative to gelatin, and is often used in vegan recipes.