The biggest problem is we have rejected science from food to begin with. We have government spending billions pushing a diet designed to create obesity (which is very high in carbs, effectively sugar, and low in fat.)
Likely there are at least two types of people biochemically- those who are insulin sensitive and those who are insulin resistant.
The insulin sensitive tend to not be fat and if they are fat its because they are really over eating. These people are the ones who end up thinking that fat people are lazy, or who think that "You should just eat less sugar" (not realizing that carbs are effectively sugar) or "calories in The insulin resistant people tend to be the fat ones. And for them a diet low in carbs is effective. I've seen a lot of studies and this is consistent in all of them.
Personally, I finally found out about the effect insulin plays on the creation and storage of energy in fat cells.
Government has been pushing a high carb diet for decades and as at the same time we have an obesity epidemic. Instead of recognizing the problem (correlation is not causation but you can't claim they have caused obesity to go down) they are going to war against fats. Transfats being banned is junk science (I eat a lot of them and my blood work is great, and getting better, not worse) and their use in the food system is because of government going to war on "Saturated" fats in the first place.
The war on Fat is the cause of obesity, in my opinion, because it is political, and not scientific, and ignores the insulin sensitivity issue.
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I'm slow banned because this site is not tolerant of diversity, so I can't reply to Max below. (And so I'm off to do something fun. Caio!)
Here's the reply I tried to give him:
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Fish oil is trans fats. I'm taking trans fats supplements!
I think the larger issue is that people are looking at things way too simplistically ("trans fats bad because more of them means problem x") and not controlling for other things-- eg: there's a huge difference between eating a pure meat and vegetable diet (And consequently a lot of fat) and eating a lot of fats in the presence of a lot of carbs. Those anti-trans fats studies did not control for carbs (as far as I can tell).
This is why the blood work of people on keto disproves the "trans fats bad" hypothesis.
And also "trans fats" are a government propaganda boogeyman-- how many people take fish oil supplements and also oppose trans fats, do you think?
I can't do two experiments on myself at once. Since things are going in the right direction now, I want to enhance my weight loss.