I Have Been Morbidly Obese So And Have Lost And

I have been morbidly obese so and have lost and gained over the years I am 68 years oid and very active ki work very hard and am limited to 30 minutes of excersise per day. I am in healthy condition but the weight is a problem . I am a carb eater and have always been I weigh a bout 230 pounds and I would like to find something that will work for me. I have dieted for years like I said loosing and gaining do you have any recommendations?