I know when I'm feeling cold all the time then I probably need iron.
Slow-FE is time-release iron and easier on your gut, but it seems some doctors don't know about it so don't suggest it (no Rx needed).
That's how I found my Naturopath, a homepathic vet gave my cat accupuncture and probiotics for a "hot gut" that was causing her to pull her hair out and it worked so well I asked for a referral. I know my other cat gets a little colitis once in a while, too. Go figure.
49 year old female attorney, diagnosed UC/pancolitis 1985, no surgery but much suffering.
Asacol/5ASA 6x400 mg maintenance for 20+ years; use prednisone & Rowasa for flares.
August 2008 sought care of naturopathic doctor. Food sensitivity test showed gluten, other intolerances; started diet without gluten, soy, dairy, tomato etc. Replete$$ probiotic powder at first, now Forte pills. Doing much better, but still having some bad days.