by Mike Geary, Certified Nutrition Specialist, Certified Personal Trainer
By throwing out the yolk and only eating egg whites, you're essentially
throwing out the most nutrient dense, antioxidant-rich, vitamin and mineral
loaded portion of the egg. The yolks contain so many B-vitamins, trace
minerals, vitamin A, folate, choline, lutein, and other powerful nutrients...
it's not even worth trying to list them all.
In fact, the egg whites are almost devoid of nutrition compared to the
yolks.
Even the protein in egg whites isn't as powerful without the yolks to
balance out the amino acid profile and make the protein more bio-available. Not
to even mention that the egg yolks from free range chickens are loaded with
healthy omega-3 fatty acids.
Yolks contain more than 90% of the calcium, iron, phosphorus, zinc,
thiamin, B6, folate, and B12, and panthothenic acid of the egg. In addition,
the yolks contain ALL of the fat soluble vitamins A, D, E, and K in the egg, as
well as ALL of the essential fatty acids (EFAs).
And now the common objection I get all the time when I say that the
yolks are the most nutritious part of the egg...
"But I heard that whole eggs will skyrocket my cholesterol through
the roof"
No, this is FALSE!
First of all, when you eat a food that contains a high amount of dietary cholesterol such as eggs, your body down-regulates it's internal production of cholesterol to balance things out.
On the other hand, if you don't eat enough cholesterol, your body simply produces more since cholesterol has dozens of important vital functions in the body.
And here's where it gets even more interesting...
There have been plenty of studies lately that indicate that
eating whole eggs actually raises your good HDL cholesterol to a higher degree than LDL
cholesterol, thereby improving your overall cholesterol ratio and blood
chemistry.
And 3rd... high cholesterol is NOT a disease! Heart disease is a
disease...but high cholesterol is NOT. Cholesterol is actually a VERY
important substance in your body and has vitally important functions... it is
DEAD WRONG to try to "lower your cholesterol" just because of
pharmaceutical companies propaganda that everyone on the planet should be on
statin drugs.
In addition, the yolks contain the antioxidant lutein as well as other
antioxidants which can help protect you from inflammation within your body (the
REAL culprit in heart disease, not dietary cholesterol!), giving yet another
reason why the yolks are actually GOOD for you, and not detrimental.
To help bring even more proof that whole
eggs are better for you than egg whites, I recently read a University of
Connecticut study that showed that a group of men in the study that
ate 3 eggs per day for 12 weeks while on a reduced carb, higher fat diet
increased their HDL good cholesterol by 20%, while their LDL bad cholesterol
stayed the same during the study. However, the group that ate egg
substitutes (egg whites) saw no change in either and did not see the improvement
in good cholesterol (remember that higher HDL levels are associated with lower
risk of heart disease) that the whole egg eaters did.
So I hope we've established that whole eggs are not some evil food that
will wreck your body... instead whole eggs are FAR superior to egg whites.
But what about the extra calories in the yolks?
This is actually a non-issue and here's why... even though egg yolks
contain more calories than just eating the egg whites, the yolks have such
a high micro-nutrient density in those calories, that it increases your overall
nutrient density per calorie you consume. Essentially, what this does is
help to regulate your appetite for the remainder of the day, so you end up
eating less calories overall. In addition, the healthy fats in the egg
yolks help to maintain a good level of fat-burning hormones in your body.

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