In the featured study, the researchers examined the nutrient content of egg yolks from hens fed primarily wheat or corn. They determined that the yolks from these conventional chickens contain two amino acids with potent antioxidant properties, which is important for the prevention of cardiovascular disease and cancer:
Tryptophan
Tyrosine
Below, I will discuss the nutrient content of organic, pastured eggs, which is far superior to conventional eggs. What's really interesting is that conventional eggs, despite their inferior nutritional content still were found to be such a potent source of heart healthy antioxidants! The analysis showed that two raw egg yolks have antioxidant properties equivalent to half a serving of cranberries (25 grams), and almost twice as many as an apple.
The research also illustrates just how destructive cooking is. The antioxidant properties were reduced by about 50 percent when the eggs were fried or boiled, followed by microwaving, which resulted in an even greater reduction.
Although not specifically mentioned in the featured study, egg yolks are also a rich source of the antioxidants lutein and zeaxanthin, which belong to the class of carotenoids known as xanthophylls. These two are powerful prevention elements of age-related macular degeneration; the most common cause of blindness.
Additionally, as a side note, the amino acid tryptophan is also an important precursor to the brain chemical serotonin, which helps regulate your mood, and tyrosine synthesizes two key neurotransmitters, dopamine and norepinephrine, which promote alertness and mental activity. I mention this to remind you that the potential health benefits of eggs certainly go far beyond heart health.