More results...

Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors
Eggs

Eggs’ reputation gets even better

One of nature’s most perfect foods may be even better for us than previously thought. Raw eggs contain almost twice as many antioxidant properties as an apple and about the same as a half of a serving of cranberries, which may help reduce the risk of cancer and cardiovascular disease, according to a new study published in the journal Food Chemistry.

While eggs are well known to be an excellent source of proteins, lipids, vitamins and minerals, researchers at the University of Alberta recently discovered they also contain antioxidant properties, which help in the prevention of cardiovascular disease and cancer.

Jianping Wu, Andreas Schieber, graduate student Chamila Nimalaratne and research associate Daise Lopes-Lutz examined egg yolks produced by hens fed typical diets of either primarily wheat or corn. They found the yolks contained two amino acids, tryptophan and tyrosine, which have high antioxidant properties.

After analyzing the properties, the researchers determined that two egg yolks in their raw state have almost twice as many antioxidant properties as an apple and about the same as half a serving (25 grams) of cranberries.

However, when the eggs were fried or boiled, antioxidant properties were reduced by about half, and a little more than half if the eggs were cooked in a microwave.

“It’s a big reduction but it still leaves eggs equal to apples in their antioxidant value,” said Wu.

The discovery of these two amino acids, while important, may only signify the beginning of finding antioxidant properties in egg yolks, says Wu.

“Ultimately, we’re trying to map antioxidants in egg yolks so we have to look at all of the properties in the yolks that could contain antioxidants, as well as how the eggs are ingested,” said Wu, adding that he and his team will examine the other type of antioxidant already know to be in eggs, carotenoids, the yellow pigment in egg yolk, as well as peptides.

In previous research, Wu found that egg proteins were converted by enzymes in the stomach and small intestines and produced peptides that act the same way as ACE inhibitors, prescriptions drugs that are used to lower high blood pressure.

That finding defied common wisdom and contradicted the public perception that eggs increased high blood pressure because of their high cholesterol content. Additional research by Wu suggests the peptides can be formulated to help prevent and treat hypertension.

Wu is convinced the peptides also have some antioxidant properties, which leads him to suggest that when he completes the next step in his research, the result will likely be that eggs have more antioxidant properties than we currently know.

Source: University of Alberta

No Comments

Sorry, the comment form is closed at this time.