Kykeon

[2] A kykeon was used at the climax of the Eleusinian Mysteries to break a sacred fast, but it is also mentioned as a favourite drink of Greek peasants.

Kykeon is mentioned in Homeric texts: the Iliad describes it as consisting of Pramnian wine, barley, and grated goat's cheese.

[4] In the Homeric Hymn to Demeter, the goddess refuses red wine but accepts kykeon made from water, barley, and pennyroyal.

[5] It was supposed to have digestive properties: In Aristophanes' Peace Hermes recommends it to the hero who ate too much dry fruit and nuts.

[8][2] Discovery of fragments of ergot (fungi containing LSD-like psychedelic alkaloids) in a temple dedicated to the two Eleusinian goddesses excavated at the Mas Castellar site (Girona, Spain) provided some possible support for this theory.