Egg white protein can lower your blood pressure as effectively as low doses of medication, according to a new study.
"We have evidence from the laboratory that a substance in egg white - it's a peptide, one of the building blocks of proteins - reduces blood pressure about as much as a low dose of Captopril, a high-blood-pressure drug," said study leader Zhipeng Yu, of Jilin University.
Yu and colleagues from Clemson University, studied a peptide called RVPSL. Scientists previously discovered that the substance, like the family of medications that includes Captopril, Vasotec and Monopril, was an angiotensin-converting-enzyme (ACE) inhibitor.
It has a powerful ability to inhibit or block the action of ACE, a substance produced in the body that raises blood pressure.
They set out to further document RVPSL's effects, using laboratory rats that develop high blood pressure and are stand-ins for humans in such early research on hypertension.
The results of feeding the substance were positive, showing that RVPSL did not have apparent toxic effects and lowered blood pressure by amounts comparable to low doses of Captopril.
"Our results support and enhance previous findings on this topic. They were promising enough to move ahead with further research on the effects of the egg white peptide on human health," Yu said.
Yu noted that the research was done with a version of the peptide that was heated to almost 93 degrees Celsius during preparation - less than the temperatures typically used to cook eggs.
He cited evidence from other research, however, that egg whites may retain their beneficial effects on blood pressure after cooking.
Yu believes that egg white peptides, either in eggs or as a supplement, could become useful as an adjunct to high-blood-pressure medication.
For now, he said people with high blood pressure should consult their health care provider before making any changes.
The study was presented at a meeting of the American Chemical Society in New Orleans.
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