What are the supplements you're using? Stuff like calcium carbonate and taurine shouldn't be that detectable, but if there are B vitamins, those are pretty smelly and can put off most cats.
Are you able to use slippery elm bark at all for the ulcers?
"To close your eyes will not ease another's pain." ~ Chinese Proverb
“We must not refuse to see with our eyes what they must endure with their bodies.” ~ Gretchen Wyler