Ambrosia
Upon his assumption into immortality on Olympus, Heracles is given ambrosia by Athena, while the hero Tydeus is denied the same thing when the goddess discovers him eating human brains.The concept of an immortality drink is attested in at least two ancient Indo-European languages: Greek and Sanskrit.The Greek ἀμβροσία (ambrosia) is semantically linked to the Sanskrit अमृत (amṛta) as both words denote a drink or food that gods use to achieve immortality.The two words appear to be derived from the same Indo-European form *ṇ-mṛ-tós, "un-dying"[20] (n-: negative prefix from which the prefix a- in both Greek and Sanskrit are derived; mṛ: zero grade of *mer-, "to die"; and -to-: adjectival suffix).A semantically similar etymology exists for nectar, the beverage of the gods (Greek: νέκταρ néktar) presumed to be a compound of the PIE roots *nek-, "death", and -*tar, "overcoming".