Why do many people outside of the Paleosphere believe that egg yolks are bad? What are some good resources that defend the consumption of whole eggs?
Old wive's tales die hard.
Back in the medical dark ages, it was theorized that if ate a lot of cholesterol it would cause your blood cholesterol levels to rise. Conversely, if you reduced cholesterol consumption it would reduce blood levels.
This theory was disproven decades ago. Even Ancel Keys (the father of the lipid hypothesis) didn't believe dietary cholesterol was anything to worry about.
"In the adult man the serum cholesterol level is essentially independent of the cholesterol intake over the whole range of human diets." - Ancel Keys, 1956
"There's no connection whatsoever between cholesterol in food and cholesterol in blood. And we've known that all along. Cholesterol in the diet doesn't matter at all unless you happen to be a chicken or a rabbit." Ancel Keys, 1997
The reason is your liver has more than enough capacity to produce all your cholesterol needs, and it is sensitive to how much cholesterol you eat. If you eat a lot of cholesterol, your liver reduces its production of cholesterol. If you eat little cholesterol, your liver ups its production of cholesterol. Just as your body has certain mechanisms to maintain a specific body temperature, your body also has certain mechanisms to maintain a specific blood cholesterol level.
This is why statins are the only method that actually works to lower cholesterol levels, because statins inhibit your liver's ability to produce cholesterol.
I consider someone's opinion about how to reduce cholesterol levels to be a touchstone for their overall knowledge. If they think you can reduce (or increase) cholesterol via dietary changes, then I assume they aren't up to speed on the latest medical literature.
Memes are powerful things. Once a concept is embedded in a society's psyche, it's amazingly challenging to change. I walk through the supermarket and I'm amazed at the number of people who are trying to lose weight via the approved "healthy" ways and failing miserably. Yet, there is remarkably little consideration given to the idea that maybe the underlying premise is flawed, they just double down and "try harder".
Ditto to what Talldog said. BTW, just back from Turkey and my in-laws were aghast that I was eating 4 or 5 eggs for breakfast. They kept telling me that I would develop a food allergy by eating eggs in hot weather. Huh?!?!?!
Anyone heard that nonsense before?
That is my favorite study as I find it, out of all the other ones on pubmed, most relevant to the type of diet many paleo-devotees follow- high protein, high cholesterol (from eggs), and energy restricted.
This kind of pseudo-science:
http://www.sciencedaily.com/releases/2012/08/120813155640.htm "Newly published research led by Western's Dr. David Spence shows that eating egg yolks accelerates atherosclerosis in a manner similar to smoking cigarettes."
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