Board Thread:Suggestions forum/@comment-26259418-20150506165931/@comment-26298013-20150507162403

Corn came from the Entwives, at least for Men. It might have been domesticated out of wild grasses by the Entwives, I don't remember the legend well enough. It is only created by EXTREMELY High Elves--Noldor lords and such. Lembas in Doriath was probably invented/created by Melian the Maia, and she was in charge of its distribution.

By the time the Fellowship reaches Lothlorien, it appears to have become either less magical or less important, and many Elves seem to have access to it. Oh, and it's not super-food like it is when Beleg and Turin use it. It apparently healed people back when Melian made it.