Yeast, Brewer's (Faex medicinalis)

Published May 5, 1988.
List of German Commission E Monographs (Phytotherapy)

Medizinische Hefe

Name of Drug

Faex medicinalis, medicinal yeast.

Composition of Drug

Medicinal yeast consists of fresh or dried cells of Saccharomyces cerevisiae Meyer [Fam. Saccharomycetaceae] and/or of Candida utilis (Hennenberg) Rodden et Kreyer Van Rey [Fam. Cryptococcaceae], as well as their preparations in effective dosage.

Medicinal yeast contains vitamins, particularly B complex, glucans and mannans.


Loss of appetite and as a supplement for chronic forms of acne and furunculosis.


None known.

Side Effects

Migraine-like headaches can occur in sensitive individuals. The intake of fermentable yeast may cause flatulence.

Interactions with Other Drugs

None known.

Note: Simultaneous intake of monoamine oxidase inhibitors can cause an increase in blood pressure.


Unless other prescribed:

Average daily dosage:

6 g; equivalent preparations. Mode of Administration Medicinal yeast and galenical preparations for internal use.


Stimulation of phagocytosis.