Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?
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Notes -
Similar to various so-called health influencer claims, I suspect the panic over seed oils is bullshit.
The claim is that omega-6 fatty acids in seed oils cause inflammation. There's a 2017 study that suggests there's no relation between systemic inflammation and linoleic acid (the typical source of omega 6 in seed oils.)
Some pundits, like the endocrinologist Robert Lustig, claim things like olive oil, when heated up enough, become transfats. This is, alas, bullshit, at least for the home cook, as olive oils would have to be heated to >200 C (about 390 F) for extended periods to have any effect. The typical temperature for deep frying may reach around 180 C, but not when sauteéing. And you'd have to be reheating the oil numerous times.
I'm not the biggest fan of Consumer Reports but here is an article suggesting the claims against seed oils are overblown.
I'm also not really comfortable with claims against so-called "processed" or "ultra-processed" food, as there's no widely accepted definition outside certain bubbles. All food really is processed--once you wash it, peel it, cut it, you're processing it. All of these things have different effects, and sometimes take away vitamins (see: washing your rice--a common, even culturally prescribed method of rice preparation in Japan--this rinses away some of the few nutrients contained in white rice) but it is not going to kill anyone. This may sound like a weasel-wording way around the term "processed" but like the push for "organic" or against "GMO" (both bullshit alarmist claims) I think the terror of processed foods is largely a storm in a teacup.
The basic knowledge we have about not eating tons of saturated fat (some is fine, just don't make it your whole diet) and eating plenty of fiber I think really covers the bases as far as a healthy diet goes. Most foods called "processed" (think things like apple juice) are essentially stripped of fiber even when it's in the original fruit. So eating lots of food that is high fat and low fiber, and doing this exclusively and all the time, is bad for you.
Sauteéng using canola oil or something, contrary to being bad for you, can actually be heart healthy.
This post appears to contradict a lot of others replying to you, which is one of the reasons I've tried to add sources (though you may not buy them, of course.)
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