Jan. 17 (UPI) -- A study from Oregon State University shows that people with metabolic syndrome may not be getting sufficient amounts of vitamin E, an antioxidant vital for cell protection, gene expression and immune function.
The study also suggests that conventional tests for levels of vitamin E in the blood may not be as accurate as previously thought.
Metabolic syndrome is a group of risk factors that increase a persons' risk for heart disease, stroke, type 2 diabetes, and other health issues. Obesity, high triglyceride levels, low HDL cholesterol and high fasting sugar are conditions that make up metabolic syndrome.
More than 25 percent of adults in the United States have metabolic syndrome and more than 30 percent of Americans are considered obese.
The study, conducted by the Linus Pauling Institute at OSU and the Human Nutrition Program at The Ohio State University, was a double-blind, crossover clinical trial, which examined vitamin E levels in people with metabolic syndrome.
"The research showed that people with metabolic syndrome need about 30-50 percent more vitamin E than those who are generally healthy," Maret Traber, a professor in the OSU College of Public Health and Human Sciences and Ava Helen Pauling Professor in the Linus Pauling Institute, said in a press release.
"In previous work we showed that people with metabolic syndrome had lower bioavailability of vitamin E. Our current work uses a novel approach to measure how much vitamin E the body needs. This study clearly demonstrates that people with metabolic syndrome need a higher intake of this vitamin."
Research found that people with metabolic syndrome retained 30-50 percent more vitamin E than healthy people. The body excretes unneeded vitamin E, so by retaining that much, researchers discovered that people with metabolic syndrome were not getting enough of it.
The research also showed a flaw with the current method of measuring vitamin E in the body.
"We've discovered that vitamin E levels often look normal in the blood, because this micronutrient is attracted to high cholesterol and fat," Traber said. "So vitamin E can stay at higher levels in the circulatory system and give the illusion of adequate levels, even as tissues are deficient."
The study was published in the American Journal of Clinical Nutrition.