Agar Agar is gelatin made from sea vegetables. The seaweeds (known as agarophytes) grow to depths of up to 80m beneath sea level. They are then freeze-dried and dehydrated before being turned into noodle-like strands, powder or long blocks. Agar agar is usually white-ish in colour. It is a vegetarian alternative to gelatin which is made from from the boiled bones, skins and tendons of animals. It has a cooling nature and a slightly sweet flavour.