Hello @macombs. I'd like to join John, @johnbishop, in welcoming you to Mayo Clinic Connect. I'm glad that you have joined.

I have also had a difficult time gaining weight but it is due to having had three surgeries on the upper digestive tract. As a result, I feel full much quicker than most people do and I tend to eat smaller meals.

I'm wondering if you know what has caused your inability to gain weight. Do you have food allergies or perhaps you have other digestive tract problems like nausea, diarrhea, etc.?

Like John said a certified dietician could be very helpful with this problem. Also, has your weight loss been sudden or over a long period of time?

I look forward to hearing from you again.