My surgeon..Dr Simper...does not use Hess. I have 100 cc common channel. I am 5'3" and was 248 lbs at surgery and I was 58 yrs old. I have had no issues, my diabetes was gone in days, and I lost 120 lbs in 13 mos and have maintained with a 4 lb bounce back for 9 months now. If that helps. ;)