It's possible I've been a bit harsh on my local DEXA scan physiologist. Her suggested target of zero for visceral fat is not her's exclusively. It is being advocated more widely as shown by this example from a Los Angeles based DEXA scanning service.



I bet this advice has a common origin. Could it perhaps be coming from the marketing departments of DEXA device manufacturers? After all when you want to sell more of something it helps if you can find a way of artificially creating a demand.