From 382 to 180 lbs after a 380 day fast. He remained below 196 for at least 5 years following the fast.
"Several years ago a grossly obese young man presented himself for treatment. Initially there was no intention of making his fast a protracted one, but since he adapted so well and was eager to reach his 'ideal' weight, his fast was continued into what is presently the longest recorded fast (Guinness Book of Records, 1971). This report describes some of the features which emerged during the 382 days of his fast."
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2495396/pdf/postmedj00315-0056.pdf
"Several years ago a grossly obese young man presented himself for treatment. Initially there was no intention of making his fast a protracted one, but since he adapted so well and was eager to reach his 'ideal' weight, his fast was continued into what is presently the longest recorded fast (Guinness Book of Records, 1971). This report describes some of the features which emerged during the 382 days of his fast."
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2495396/pdf/postmedj00315-0056.pdf