I lost 75 lbs in a yr but I didn't do it in a healthy way. I lost the first 30 in 3 weeks. Just quit eating. That's what lead to my Gallbladder probs. rapid weight loss. Seeing you Dad go thru triple bypass at 58 eighty lbs lighter than you will make you wanna take it off fast. Now I'm maintaining my weight by 1) Drinking NOTHING but water and a lot of it. 2) eat NOTHING fried 3) no desserts.