Seed oils being unhealthy is a recent meme I keep seeing, besides health influencers talking constantly about it, the science just isn’t there.
Polyfats are unstable by definition, so when you cook with them, they go rancid pretty fast. That is all very well known.
Besides, seed oils usually produce imbalance of w-3 vs w-6 fatty acids which is also deemed to lead to pro-inflamation effects.
This is all very well known and not a hype. Here is a review from 20 years ago:
https://www.sciencedirect.com/science/article/abs/pii/S09523...
https://www.bbc.co.uk/future/article/20250530-are-seed-oils-...
I'd vaguely assumed that it was bored anti vaxers looking for a new Big Bad, but apparently it was Joe Rogan in 2020. Per Google Trends, it seems to have peaked early 2025, which is _much_ later than I thought. Maybe this is a consequence of dumping twitter; I'm missing out on important Oil Discourse.
> they go rancid pretty fast
Fast like you use it once or twice, it goes rancid.
I witnessed restaurants in the Meditterian that keep oils on the tables for salads, and they are rancid due to hot temperatures.
Cook on coconut oil or palm oil, they are the most stable ones. If you go with plant oils, use olive oil as it seets in between poly and saturated oils.