The word "opotherapy" comes from (juice) and (treatment) and was coined by Landouzy, who supposed the juice of organs, or products contained in the juices, to have a therapeutic effect. Opotherapy consists of using desiccated healthy animal tissues or their juices, or the active principles extracted from them; they may be administered by the gastrointestinal route or by injection. The idea of treating diseases with extracts of animal organs is a very old one, and is based upon both tradition and empirical observation.

The Greeks , Romans and Arabians all used this type of therapy; its fortunes then became very variable, until the first half of this century when it again enjoyed a certain importance, mainly in France (studies by C. Bernard, Brown-Séquard, Gley). At present, in consequence of the huge progress that has been made in the production of synthetic molecules and the correlated pharmacological studies, it has almost been abandoned. However, some desiccated glands and gland extracts are still used for many other applications.

Product Group	Product	Source
Costantino Series Opotherapic Products	Liver Extract 20 mcg/g B12 Bovine	Beef liver
	Liver Extract 20 mcg/g B12 Swine	Pork liver
	Liver Extract NFXI Swine	Pork liver
	Liver Extract liquid flavouring agent	Pork liver
	Liver Powder	Pork liver
	Mucosa Extract	Pork stomach
	Spleen Extract	Pork spleen