I posted this on another board as I need serious help and am not sure what to do or where to start off, so I hope you can help. Here's my issue, I have a good reason to believe that I have a malabsorption issue (I am not absorbing my nutrients and intake). One of the reasons is that I recently got a blood test and my triglyceride level is 36. Normal is around 100. My dad and mom have a range of 100 as well, but mine is really low. I started reading up and they noted how a tri level that low may mean I have malabsorption issues. Also, further notice would be that I am severely underweight. So besides my tri levels, here is the problem that indicates this: I'm 6'1 but only weigh 125 pounds (16.5 BMI). I am severely underweight. But not because I eat little. As far as my eating habits go, I eat a LOT and ensure I get everything. 2,000 to 3,000 calories, with lots of protein, carbs, and essential fats, vegetables and fruit. I meet all my requirements and then some, I've tried it all. I've even tried eating in excess of 4,000 calories, with 1.5 grams of protein per lb of body weight. I've tried ensuring I get all my essential fats, vitamins, minerals, and all that. I've even tried just eating all this in 3 big meals to slow down my metabolism but I don't believe I have a fast metabolism at all, as I don't usually require much to stay very full! One thing I also read is that malabsorption comes from enzyme deficiencies. What can I do to regulate my digestive system so that I don't have malabsorption issues? I don't know anyone as rail thin as I am, and eat twice as much as people twice my size. Plus my triglycerides support my theory on malabsorption through either enzyme deficiency or something else. I was hoping someone could guide me. Serious responses only, and any advice will be taken and not over looked. Thank you.