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 Linoleic acid is a type of fat, or fatty acid, found in vegetable oils, nuts, seeds and animal products. An essential omega-6 fatty acid, linoleic acid is required by the human body in small amounts. Too much, however, can be detrimental to your health. Consumers of a standard American diet are much more likely to get too much linoleic acid than too little.

The majority of Americans might be misled by official health recommendations to eat “healthy” vegetable oils. Even the term “vegetable oil” is misleading because it gives you the impression that you are receiving vegetable micronutrients when these oils are actually highly toxic, industrially-processed seed oils. Seed oils are some of the most dangerous items you could eat. This is even more of an issue today as the high amounts of oxidative stress these oils cause seriously impair your immune system and radically increase your risk of all infections.
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 Is the problem lineolic or linolenic acid? 
 Both, I believe.  
 Few are willing to accept that olive does in fact suck 
 Good olive oil is possibly the least worst plant based oil (an argument for coconut oil can be made)... 

But, gimme butter!  
 You need a very specific kind of olive oil that I can’t remember the name of. Something like organic extra virgin cold pressed olive oil. Most olive oils are impossible to distinguish from seed oils. And cooking olive oil makes it look more like a seed oil too. I guess if you want to eat a salad, good olive oil is fine. But if you can’t use animal fats to cook, I’d still go with coconut oil.

I’ll also take butter though 🤝 
  A lot of olive oils are not pure olive oil.  
 if it doesn't say "extra virgin olive oil" it's chemically extracted and hot pressed

extra virgin literally means cold pressed, first pressing 
 Even then, best case it’s purely monounsaturated fat, which still has that extra double bond that’s more easily oxidized. Evolution already figured out the perfect saturated/mono/poly ratios for humans: ruminant fat. 
 Agreed 
 And tallow.  
 tallow > butter

stearic acid is really good for you 
 Plus it tastes so good 
 Avocado oil has been making some waves recently.  Don't know anything about it good or bad. 
 It's definitely better then a lot of oils. However there are better oils out there to use.  
 Coconut oil is still better. Avocado oil is probably better than most olive oil and about equivalent to the best olive oil.