Figs. 3 and 4 illustrate the variability in cholesterol and vitamin
D among eggs sampled at the 12 individual retail locations in 2010.
The eggs from the NY location had notably higher vitamin D
content. Additional sample units from the same NY store were resampled
on 2 additional occasions within four months and
analyzed. These samples had lower vitamin D content than the
initial sample of eggs from this location, but the NY location mean
(9.22 mg/100 g) was still significantly greater than in eggs from any
of the other locations. The variation in cholesterol (339–405 mg/
100 g) and vitamin D3 (0.73–9.22 mg/100 g) in eggs from different
locations probably reflects industry efforts to introduce eggs with
modified nutrient composition that have been studied for positive
benefits on serum cholesterol