In a recent study reported by Science Daily, eating egg yolks may be as bad for you as smoking cigarettes!
Eating egg yolks builds up carotid plaque, increasing risk factors for heart attack and stroke. Eating as few as three yolks a week significantly promotes plaque buildup. In patients that are diabetic, the risk increases 2-5x. You can read the full story from the link above or below in the references.
In addition to researching health benefits / hazards to humans, the study of the egg is very relevant to conservation as well. Did you know that females birds deposit substantial amounts of steroids into the yolks of their eggs? Phenotypic differentiation and physiological functions develop from these steroid (hormones); affecting nestling growth and development (Kozloswski, et al., 2009).
There are over 39,000 articles on egg yolks if you search on Searchwise in our electronic resources.
Image Credit: © Irochka / Fotolia (reposted from Science Daily).
J. David Spence, David J.A. Jenkins, Jean Davignon. Egg yolk consumption and carotid plaque. Atherosclerosis, 2012; DOI: 10.1016/j.atherosclerosis.2012.07.032
Kozlowski, C. P., Bauman, J. E. and Caldwell Hahn, D. (2009), A simplified method for extracting androgens from avian egg yolks. Zoo Biol., 28: 137–143. doi: 10.1002/zoo.20221