Subject: cooking oil and cancer
They've established a link between a component of some cooking oils and breast cancer.

https://www.syracuse.com/healt...

Generally speaking, linoleic acid is an essential nutrient needed to build cell membranes, protect skin, and support heart health. However, the study notes that since the 1950s, linoleic acid consumption has increased significantly as cooking oils have become commonplace in fried and ultra-processed foods. These findings are believed to be the first to raise concerns about the fatty acid’s potential link to disease.

Most common in seed oils. The scientists hedge a bit saying "no need to avoid seed oils entirely". But with a risk of such a nasty cancer, why wouldn't you? We've been moving away from cheaper oils for a while now. We've always used olive oil, and now have started using avocado oil for actual cooking (it has a high enough smoke point to use it that way). We have some canola oil, but I suspect we won't buy any more once it is gone. We don't use it for much...mostly deep frying, which we don't do often.