References:
1. USDA ARS, Nutrient Data Laboratory. USDA National Nutrient Database for Standard Reference, Release 28.
2. Campbell B et al. International society of sports nutrition position stand: protein and exercise. J Int Soc Sport Nutr. 2007;4:8
3. Vishwanathan R, Goodrow-Kotyla EF, Wooten BR, Wilson TA, Nicolosi RJ. Consumption of 2 and 4 egg yolks/d for 5 wk increases macular pigment concentrations in older adults with low macular pigment taking cholesterol-lowering statins. Am J Clin Nutr 2009;90:1272-9.
4. Egg Nutrition Center. 2016 Health Professional Tracking Survey: https://www.enc-online.org/content/uploads/2017/03/2016-HP-Tracking-Survey-Recap_web.pdf