I don't know specifically about whether IBD causes "low libido," but I have read where the NIH has concluded that IBD can "contribute to the impairment of normal sexual functioning." Plus, here's another point to consider: Both Crohn's and UC cause fatigue. In turn, that fatigue can lead to a low libido. Additionally, I am a menopausal woman who is experiencing that issue at age 53. (I was diagnosed with UC more than 30 years ago, too.) I'm not sure about the specifics of your experience, but I just think the emotional toll alone of IBD could probably result in a low libido. Maybe others can chime in here with more information. I'm no doctor, but I did read where immunosuppressants such as Stelara exhibit the side effect of fatigue. Sooo...I feel like those of us with IBD probably do have lower libidos than the general population. I'm not sure if this helps or not. Again, maybe someone with more information will offer more specific details. Sincerely--Traci (UC-IBD Team Member)