Does anyone know?

Does anyone know what percentage of calories we don't absorb after the gastric bypass? I tried looking on the web and didn't see anything. I know it would be approx. I am just curious. Angel

My understanding is that everyone is different and it really depends on how much small intestine is bypassed. I also remember reading that by 2 years out, we really don't malabsorb much anymore, hence the problem of taking more wt off or maintaining.