I haven't been keeping up on what type oil or fat is currently the least unhealthy. Here's what I think I know: - Saturated fat is bad, partially hydrogenated fat is worst - Should we choose mono or polyunsaturated oil? It seems the consensus changes every few years. Where do we currently stand? - We need Omega-6, but we get more than enough of it in our average diet. - We also need Omega-3, because our body can't make it. Omega-3 is in short supply through the average diet. Mercury-free fish oil caps are probably the safest choice. - Some oils, like flax seed oil, are more prone to stimulate bad eicosanoid production. I remember flax seed oil was once shunned, but now it's suddenly good -- unless you are the owner of an older prostate gland. I'm not using much fat at all anyway. I've been using cold-pressed virgin olive oil and safflower oil. Sometimes I use walnut oil. When baking, I stick with butter, because I find any other fat objectionable in baked goods. Who can catch me up?