Calogen is a Food for Special Medical Purposes for use under medical supervision. Calogen is a high energy, long chain triglyceride fat emulsion. Calogen can be used to supplement or fortify the diet of patients who are unable to meet their energy requirements from normal food and drink. Calogen is suitable for patients requiring electrolyte restrictions, can be used to replace milk in protein restricted diets, and can be used as an energy enhancer in tube and sip feeds.

Calogen is available in 200ml and 500ml plastic bottles, in 3 flavours: , and .