Non-wheat "bread" is not the proper matter.
The Vatican also said that Catholics with celiac disease could receive Communion via wine only.
Been there. Done that. What's the problem? Reception under both species is not necessary.
However, for faithful catholics with celiac disease and gluten intolerance who want to participate more fully...
This isn't encounter group. Get over it. I did, in about ten seconds.
Those allergic to wheat can consume only the transubstantiated wine which contains both the Body and Blood of Christ.
If the bread turns into the literal body of Christ, why is it a problem for people with celiac? It’s not wheat anymore.