Are all smoke or fume from cooking oil toxic?

[kenny1999]

It's said when cooking oil is heated on a pan and it starts to give fumes or smoke it is going to be toxic, does it apply to all cases (i.e. as soon as you see smoke or fume) or only extreme case when the cooking oil is heated for too long (e.g. when someone does not pay attention to cooking)

[iNow]

Inhaling the byproducts of any combustion (burning) is toxic and/or carcinogenic, so the question really is how much, how does it differ based on the substance being burned, and how do those things map to your personal level of risk tolerance. 

Keep in mind it’s not just the oil,in your pan, but the heating being applied below it that matter here. 

Edited August 10, 2022 by iNow

[exchemist]

6 hours ago, kenny1999 said:

It's said when cooking oil is heated on a pan and it starts to give fumes or smoke it is going to be toxic, does it apply to all cases (i.e. as soon as you see smoke or fume) or only extreme case when the cooking oil is heated for too long (e.g. when someone does not pay attention to cooking)

It seems there have been studies on this: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4881732/

Fumes from hot oil are not combustion products, but they do contain a lot of species chemically altered by heat -by thermal cracking, in effect. There are some details in the link, though that study was mainly concerned with the epidemiology of lung cancers. 

[kenny1999]

17 hours ago, exchemist said:

It seems there have been studies on this: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4881732/

Fumes from hot oil are not combustion products, but they do contain a lot of species chemically altered by heat -by thermal cracking, in effect. There are some details in the link, though that study was mainly concerned with the epidemiology of lung cancers. 

I am not able to spend enough time and effort reading everything but I have read the title of your link. But why "Chinese women" is specified, do Chinese women have significant higher incidence of lung cancer when exposed to cooking oil fume? Can I have some conclusions about the study? I've read the conclusion but it's just a conclusion.

By the way, is it useful to protect against cooking oil fumes by wearing medical mask used for COVID19?

 

 

Edited August 11, 2022 by kenny1999

[CharonY]

The title refers to Chinese women because the study involved a cohort of Chinese women.