Well, generally things that are inflammatory contribute to acne flare-ups. With that said, saturated fat is the least inflammatory (certain versions of SF vary slightly) of the fats one can consume. Perhaps you're particularly intolerant to dairy (see: butter) and that's causing your skin to throw a tantrum? I'd suggest replacing your use of butter with coconut oil or some sort of animal fat--see what happens.

Good luck.

My skin has improved a lot since eating this way - coming up 3 years. Excema, gone. Psoraiasis, virtually gone. Skin, has more of a glow - doesn't look "grey~", and tans much more easily - even in winter, it doesn't have that very white look that it used to get (and that other people still get - this winter, I kept being asked if I had been on holiday abroad - D3, perhaps??)

And the dry skin I used to have and be embarrassed about on legs and arms is now fine. I think it is to with two things - cutting out all seed oils, so lowering O6, and eating good saturated and monounsaturated fats.

Perhaps you have started eating - or eating more of - something you have an intolerance to?

butter is bad for your skin because it contains high amounts of arachidonic acid which is inflammatory. My skin gets really bad eatiing butter and eggs even though i really wanted to believe they are good for me.

Here is what I think is going on- casein proteins in the butter are the culprit, not the saturated fat. If I either make ghee or buy it, my face stays very clear. Some butters are made better than others- they vary in the level of proteins that they still have in them depending on the way the butter is made. My skin also reacts badly to extra virgin coconut oil because of some of the proteins in coconut.

So, for some of us at least, we'd have better skin with refined saturated fat because then all the allergens are out.