Carrageenan is a widely used food additive, which is allowed to be added in many foods. So as long as it is not too much, there is no harm.
Carrageenan is not composed of a single component, but belongs to hydrophilic colloid and dietary fiber, which cannot be absorbed and metabolized by human body, so it has no nutritional value. At present, it is widely used as food additives and fortifiers.