Agar-agar: from microbiology to molecular cuisine Introduction: Marine gelling polymer Agar-agar is a natural polysaccharide extracted from the cell walls of red algae (mainly the genera Gelidium and Gracilaria). Chemically, it is a mixture of two polymers: agarose (forming a rigid gel matrix) and agaropectin (giving plasticity). Unlike gelatin (an animal-derived protein), agar is a vegetarian, vegan product, calorie-free, and not digestible by the human body, which classifies it as a dietary fiber. Its unique property is the formation of a thermoreversible gel of high strength at concentrations of 0.5-1%, with gel formation occurring at temperatures of about 35-40°C, and melting only when heated above 85-95°C. This opens up wide possibilities for culinary applications. Fundamental properties and distinction from other gelling agents Thermostability: Gel on agar does not melt at room temperature and retains its shape in hot dishes (for example, in pie fillings). This is its key advantage over gelatin, which melts already at 30-35°C. "Temperature memory": The solution gels upon cooling, but once set, requires a much higher temperature for melting. This allows for the creation of stable structures. Transparency and neutrality of taste: It gives crystal-clear gels without its own taste and smell, ideal for delicate desserts and visual effects. Synergy: The combined use with other hydrocolloids (such as locust bean gum — carob gum) allows for achieving unique textures — from elastic to crunchy. Main application areas: from science to cuisine 1. Scientific laboratory (initial application):Agar is an indispensable base for culture media in microbiology (Petri dish). Its ability to remain solid at the temperature of bacterial incubation (37°C) and not be destroyed by the action of enzymes of microorganisms has made it the gold standard. This is an historical example of a "food" product coming to science. 2. Traditional Asian cuisine: Japan: "Anmitsu" — a dessert made of cu ... Read more