For example, the time points we chose to draw blood and
measure endpoints may not have been representative of the entire postprandial period, the
oil and nutmeat extraction method may have contributed residuals and / or adversely affected walnut bioactives, and the polyphenols in walnut skins may have been only partially absorbed because of their high fiber
content.
Lutein and zeaxanthin were not
measured because they co-eluted with the high
content of tocopherol in the plasma chylomicron fraction resulting from ingestion of canola
oil in the salad dressing.