system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are olive, coconut, and avocado oils considered to be healthy and cannot be deep fried, but oils like vegetable oils aren't?
gpt
Coconut and avocado oil actually have very high smoke points and very suitable for deep-frying, however they are not cheap to produce - a jar of good coconut oil is £6-8 here, and that will provide nowhere near enough to fill a deep-fat fryer. Also, coconut oil has a distinctive coconut flavour that may or may not be desirable - neutral flavoured oils are generally more agreeable.

The best, most stable fat to cook with is animal fat - such as tallow or lard. Grass-fed for omega-3! Seed oils are full of health-negative omega-6.