I had one of the first Gastric Bypass surgeries 50 years ago at Dartmouth Hitchcock Hospital in NH. I was 15 years old. I lost 400 lbs and when my endocrinologist told me i was obese, it freaked me out. She used the BMI calculator to determine this. Now that my acquired hypothyroidism is under control and my A1C is in the normal range, i have been able to loose weight. My question is, how accurate can this test be, when i have about 15 pounds or more of loose skin? I am 5’ 10” and the scales say I weigh 185. It has been difficult to keep my weight this low. Without the extra skin, I would weigh 170.