The food matrix in which carotenoids are found affects their bioavailability. Lutein and zeaxanthin are abundant in egg yolks and accumulate in the macular region of the retina, where they may affect visual function. We sought to determine whether plasma lutein and zeaxanthin concentrations are elevated after dietary supplementation with egg yolk. Each subject consumed all 4 diets. Commercial chicken egg yolks were analyzed for carotenoids and cholesterol.
Egg yolk is a highly bioavailable source of lutein and zeaxanthin.
The benefit of introducing these carotenoids into the diet with egg yolk is counterbalanced by potential LDL-cholesterol elevation from the added dietary cholesterol.