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humans have existed for about 2.5M years, Canola oil for about 100 years. A new food to the human organism is going to have health effects, the premise of this post is what are people doing now that will surprise them as unhealthy.... industrial processed oils as a primary dietary fat source is a great example... everyone assumes they are healthy and natural.
The seed oil itself is a new food to the human experience, not just how its processed, but its a double whammy packaged together. You can get most people to agree that highly processed foods are bad for health, but most silently carve out an exception for the industrial processed oils.
Agreed that plant fats, and industrial processed oils lower LDL - however, is that actually healthy? LDL is not a disease, you would die without it, you need your lipoproteins to function. The vilification of LDL for the damage sugar (highly processed or not) has done is quite the misstep in public health in the last 50 years.
Okay, so what is the mechanism and the damage that seed oils or industrial process do?
The plant sterols are similar to, but don't function the same as, human cholesterol, so it interferes with human hormonal function (this is why LDL lowers). Industrial leftover chemicals, such as the solvents, are a likely source of contamination at low doses, but we don't know the effect over time. Quite frankly demanding proof that the new food isn't safe is backwards, you should be demanding proof that it is safe, and demand to read the human studies (animal studies too) looking at all cause mortality.
I was asking for proof on your positive claim. You're making the claim that seed oils are bad. I'm expressing doubt. The burden of proof is yours.
There are several studies that proof seed oil is safe, someone linked a pair up in the thread. This person don't want to listen to anything that says they are wrong and of course they have no proof to back their claims.
There are no studies extant in the literature for any hard health outcomes when it comes to human nutrition. Only epidemiology. I'd personally like to see proof that industrially processed oils are safe for human consumption.
Here is a thought experiment: processed industrial oils were not a dietary input before ww1, would you say people are healthier now? Would you say heart disease is higher or lower now then before ww1?
Yes people are healthier than WW1, have you never heard of the goiter belt? Also people died of heart attacks like pretty commonly(they survive now because of better treatment), They didn't know what they were or how to treat them. So we don't have much data about heart conditions until after WW2 once we figured out what a heart attack was. I think right now there's only some consensus on what causes heart diseases, and diet is definitely a part of that.
Also you keep saying processed industrial oils, but what exactly counts as that? Is only some olive oil processed industrial oil? I'd like a definition.
Club term argument: was life expectancy higher or lower before WW1?
And is the increased use of seed oil the only thing that could contribute to heart attacks and overall health, or were there too many variables to control for?
I'm not saying you are wrong (or right), but that argument does not really work.