Remarkable what a microwave does! Whenever I suggest to patients to get rid of this, most of them rapidly change the subject. Even Dr Greger has a video where he lauds the microwave but here he seems to have forgotten this [oxidation!!] Use often some sage[spice/herb] and other spices in your food preparation. Buy a good book about spices!

https://nutritionfacts.org/video/how-to-reduce-cholesterol-oxidation/