Renji took a few notes, a thoughtful expression upon his features. "You are the one that stopped the treatment, however. This is important to note. I am hoping to find the best compromise I can, here." he assured him.
He explained that first he hoped to find a way to stabilize the side-effects enough that his condition would allow him to at least eat. From then on, things could fall in place more smoothly.

He had a few choices of drinkable supplements that were entirely natural. He seemed to not use any chemicals unless he really did need to.