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 I thought grape seed was ok because it doesn’t require processing 
 Think the harsh industrial processes and thousands of grapes required to coerce one spoonful of fat out of the tiny hard seeds of a grape. 
 But what I was told with grape seed oil is that it is cold pressed and not processed just like avocado and olive 
 Something I once heard that I assume to be true is that, most seed oils aren't overtly bad for you (which doesn't mean that there aren't better options) so much as that they're often found in lots of high calorie, low nutrition foods that, when eating with any frequency, are pretty bad for you.

But believing this will make you fail group purity tests, and get you othered so it can't/mustn't be true 🙂 
 Grapeseed oil can be a bit tricky. I prefer to stick with fats I trust and know are healthy. Homemade options definitely taste better and feel safer, at least for me 😅 
 We only use the grape seed when we need to deep fry because it has a high smoke temperature, I use lard normally to cook in or whatever grease is left in the pan and my wife uses olive oil for baking normally 
 Well in my cooking gallery I share how I bake and fry everything in beef tallow if you ever want to take a look. 🤗 
 @paloma is correct and ill add some nuance 

Seed oils *RAW* aren’t too bad in small quantities. 
-Plants dont want you to eat the seed, (its their reproductive method) so they have interesting ways to discourage foraging.  (Toxins)

The single biggest issue with “seed” oils is that their expensive to refine. 
-Cold pressing is time consuming and expensive in commercial quantities so instead they boil the seeds and drain off the oil. (damages the fat and effectively makes it rancid and toxic)

Seed oils are Omega-9 and are delicate.  
-They spoil quickly even in the refrigerator and are often refined with detergent during processing to remove toxins that would otherwise make them taste bitter.

I could go on but you get the gist.

Just buy oils that are omega 3 or 6 and keep the omega 9s in your diet in the form of raw nuts.  Don’t cook with them.  (Or buy baked nuts, same problem)
🍻🧡👊🏻🥩 
 Cook with beef fat/tallow.  Cheaper, healthier and delicious.