hi raz,
http://www.sdearthtimes.com/et0598/et0598s12.html
i just believe that too much saturated fat clogs up your arteries. and if there is not enough essential fats, one's cellular membranes become too stiff, and non-permeable, thereby making it harder for nutrients to both ingress and egress from the cellular walls, and the organelle's walls.
in my viewpoint, i am not advocating a low-fat diet, as i was on that for a long time, and know that my body does indeed need the essentials. if your hubby wants to continue on that type of diet, perhaps he can do what i am doing, to make sure he has enough of the essentials.
i first started fixing my fats by adding fish and flax oils. my omega3 tests were coming out on the high side, but my omega6 was extremely low. it was when i added the omega6 that i really saw most of my results.
i will repeat one thing - most omega6 that people get in their diets has been heated and processed, so it is really not an essential fat any more. i do not believe that omega6 is to blame, but rather the type of omega6 that we are eating.
i make sure that people do not heat, cook, or anything to the safflower oil, or flax meal, as the polunsaturates are highly suspect, when heat or light hits them.