-consider supplementing yourself with Calcium and Vitamin D (prednisone reduces calcium in your body and Vit. D is a great supplement to get the immune system running smoother)
Unfortunately, this supplementation is not going to help much.
Addition of fluoride could help
http://www.ncbi.nlm.nih.gov/pubmed?term=10647595, could be of help
http://www.ncbi.nlm.nih.gov/pubmed/19559158, A review
Sorry, this post is not a direct help to you but could be of use, since you are on long term steroid use.
Diagnosed March 2007 with left sided UC at the age of 30.
Colazal 9 daily, Imuran, 200mg daily, Vit. B12, 1mg, Multivitamin, 1 tablet daily, Fish oil 2400mg daily, Vit D 2000 IU daily.
Verapamil 240mg for migraine, Migraine episode now at least twice a month,
Ibuprofen 400mg is the only solution (but leads to bleeding). Looking for alternatives.