i have had the same problem as you. My lymphocyctes was low and the nuetrophills high with elevated wbc. which dr. too blamed on predisone. I also lost most of my hair. It is now growing back curly and black which i had light brown hair before. Drs never seem concerned with any of my blood tests. Took them a long time trying to find it. I lost problem about 22 pounds. I was having water diaherra then getting on medications and was still going 6 times a day formed but still many times. I am on humira, pentasa, sol medrol and dropping on sol medrol noticed that i am having more bowel movements than before i dropped. So we will see. But i dont know if you can still have malsorbtion but all i know food for me would come out whole, or diaherra and lost my hair for a bout 6 months. Had to basically cut it spikey because it fell out in so many areas. i have gained about 10 pounds back and feel pretty good. I can tell the difference just by dropping steriod 2-4mg.
I got diagnosed with ibs 8 years ago which i never lost weight all the bowel movements i had. Things got worse stuff was passing threw whole 10-15 bowel movements a day. I knew something wasnt right. September 11, 2007 they found the crohns and since dec of 07 to may of 07 my weight dropped like i said 22 pounds to 123 and would fluctuate to 125 so by september was 125. I was eating and drinking the best that i could while having to go to the bathroom all the time. Just dealt with it. You dont drop weight from ibs.