You can eat, agar will not be absorbed by the body, there is a laxative effect. Suitable for diabetics to eat, can also be used for weight loss. It is generally extracted from the marine plant parsnip, so there are no side effects. However, it is often used in the laboratory to make culture medium, which is actually a kind of thing. The agar we use in the lab I feel the same as in the kitchen, if you consume it, try to buy the kind of food packaging, rest assured. Also, agar is also called cool whip.