As far as Zinc supplements for taste, my RO said they could not hurt and often help. He did warn me that about half his patients did not notice any improvement while the other half got great results. His rule of thumb was that after half a bottle, if you did not notice any changes, you probably wouldn't, so I too did not finish an entire bottle.
Of course this is moot now with the G tube although I can "taste" the reflux.
Charm