Hi, I am 85 Years old and weight 95 Kilos. I have Knees Replaced 9 years ago and are painful now, have had Cataract removed and new lenses inserted followed by muscular Hole Surgery which is Partly successful because the damaged tissue has Left a Dark Mark through which there is no sight. I Know I Need To Loose Weight But Reluctant To go on a Diet because I eat Healthily, I think. Advice will be Much Appreciated.