(25-05-2018) Consumption of 2 and 4 egg yolks/d for 5 wk increases macular pigment concentrations in older adults with low macular pigment taking cho
Vishwanathan R 1, Goodrow-Kotyla EF, Wooten BR, Wilson TA, Nicolosi RJ.
Author information
Abstract
BACKGROUND:
Lutein and zeaxanthin may reduce the risk of dry, age-related macular degeneration because of their photo-oxidative role as macular pigment.
OBJECTIVE:
The present study evaluated serum lutein, zeaxanthin, and macular pigment optical density (MPOD) responses at 0.25 degrees , 0.5 degrees , and 1 degree retinal eccentricities to the consumption of 2 and 4 egg yolks/d by older adults taking cholesterol-lowering medications.
DESIGN:
Subjects consumed foods containing 2 followed by 4 egg yolks/d for 5 wk each with a 4-wk egg-free period at baseline and between the 2 interventions.
RESULTS:
Changes in MPOD (n = 37) with egg yolk consumption were inversely associated (P < 0.05) with baseline MPOD. Subjects with low-baseline MPOD (defined as MPOD < or =0.5 at 0.25 degrees , < or =0.4 at 0.5 degrees , and < or =0.35 at 1 degrees ) showed increases of < or =50% (P < 0.05) with 4 egg yolks at the 3 retinal eccentricities. MPOD increased by 31% (P = 0.059) at 0.5 degrees with 2 egg yolks. Serum lutein increased by only 16% and 24% (P < 0.05) compared with increases of 36% and 82% (P < 0.001) in serum zeaxanthin (n = 52) after consumption of 2 and 4 egg yolks, respectively. Serum HDL cholesterol increased by 5% (P < 0.05) after consumption of 2 and 4 egg yolks. Serum LDL cholesterol did not change with either egg yolk treatment.
CONCLUSIONS:
Consumption of 4 egg yolks/d, and possibly of 2 egg yolks/d, for 5 wk benefited macular health in older adults with low MPOD. Serum HDL cholesterol increased without an increase in LDL cholesterol in this study population, most of whom were taking cholesterol-lowering statins.
Source: Am J Clin Nutr. 2009 Nov;90(5):1272-9. doi: 10.3945/ajcn.2009.28013. Epub 2009 Sep 16.
News
In evidenza
"L'informazione presente nel sito serve a migliorare, e non a sostituire, il rapporto medico-paziente."
Per coloro che hanno problemi di salute si consiglia di consultare sempre il proprio medico curante.
Informazioni utili
-
Ricette a zona
-
Tabelle nutrizionali
-
Tabella composizione corporea
-
ABC della nutrizione