Agar or agar-agar is a substance that is used as a culture medium while growing bacteria and fungi in the laboratory and medical institutions around the world.
Agar is one of the most important of all algal substances.
It is also used in the preparations of some medicines, as a base for cosmetics and as an agent in baked goods to retain moistness.
Agar-agar is obtained abundantly from the red algae Gelidium and Gracillaria.
