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Good dietary source of vitamin E.

Vitamin E critical during first 1,000 days of life

Amid conflicting reports about the need for vitamin E and how much is enough, a new analysis suggests adequate levels of E are critical for our first 3 years, for the elderly, and for women who are or may become pregnant.

A lifelong proper intake of vitamin E is also important but often complicated by the fact that this nutrient is one of the most difficult to obtain through diet alone. It has been estimated that only a tiny fraction of Americans consume enough dietary vitamin E to meet the estimated average requirement.

Meanwhile, some critics have raised unnecessary alarms about excessive vitamin E intake while in fact the diet of most people is insufficient, said Maret Traber, a professor in the College of Public Health and Human Sciences at Oregon State University, principal investigator with the Linus Pauling Institute and national expert on vitamin E.

"Many people believe that vitamin E deficiency never happens. That isn't true. It happens with an alarming frequency both in the United States and around the world. But some of the results of inadequate intake are less obvious, such as its impact on things like nervous system and brain development, or general resistance to infection."

Maret Traber, professor, College of Public Health and Human Sciences, Oregon State University, principal investigator with the Linus Pauling Institute.

Some of the best dietary sources of vitamin E – nuts, seeds, spinach, wheat germ and sunflower oil - don't generally make the highlight list of an average American diet.

One study found that people who are highly motivated to eat a proper diet consume almost enough vitamin E, but broader surveys show that 90 percent of men and 96 percent of women don't consume the amount currently recommended, 15 milligrams per day for adults.

In a review of multiple studies, published in Advances in Nutrition, Traber outlined some of the recent findings about vitamin E.

Findings

Inadequate vitamin E is associated with increased infection, anemia, stunting of growth and poor outcomes during pregnancy for both the infant and mother.

Overt deficiency, especially in children, can cause neurological disorders, muscle deterioration, and even cardiomyopathy.

Studies with experimental animals indicate that vitamin E is critically important to the early development of the nervous system in embryos, in part because it protects the function of omega-3 fatty acids, especially DHA, which is important for brain health. The most sensitive organs including head, eye and brain.

One study showed that higher vitamin E concentrations at birth are associated with improved cognitive function in two-year-old children.

Findings related to increasing diseases in the developed world, such as non-alcoholic fatty liver disease and diabetes, suggest that obesity may reflect inadequate micronutrient intake.

Circulating vitamin E levels often rise in the blood with age as lipid levels also increase, but do not prove an adequate delivery of vitamin E to tissues and organs.

Vitamin E supplements do not seem to prevent Alzheimer's disease occurrence, but have shown benefit in slowing its progression.

A report in elderly humans showed that a lifelong dietary pattern that resulted in higher levels of vitamins B,C, D and E were associated with a larger brain size and higher cognitive function.

Vitamin E protects critical fatty acids such as DHA throughout life, and one study showed that people in the top quartile of DHA concentrations had a 47 percent reduction in the risk of developing all-cause dementia.

One study showed that higher vitamin E concentrations at birth were associated with improved cognitive function in two-year-old children.

Findings with regards to increasing disease rates in the developed world, such as non-alcoholic fatty liver disease and diabetes, suggest obesity may reflect inadequate micronutrient intake.

Measures of circulating vitamin E levels in the blood often rise with age as lipid levels also increase, but do not prove an adequate delivery of vitamin E to tissues and organs.

Vitamin E supplements do not seem to prevent Alzheimer's disease occurrence, but have shown benefit in slowing its progression.
A report in elderly humans showed that a lifelong dietary pattern that resulted in higher levels of vitamins B,C, D and E were associated with a larger brain size and higher cognitive function.

Vitamin E protects critical fatty acids such as DHA throughout life, and one study showed that people in the top quartile of DHA concentrations had a 47 percent reduction in the risk of developing all-cause dementia.

"It's important all of your life, but the most compelling evidence about vitamin E is about a 1000-day window that begins at conception. Vitamin E is critical to neurologic and brain development that can only happen during that period. It's not something you can make up for later."

Maret Traber, professor, College of Public Health and Human Sciences, Oregon State University, principal investigator with the Linus Pauling Institute.

Traber recommends a supplement for all people with at least the estimated average requirement of vitamin E, but that it's particularly important for all children through about age two — for women who are pregnant, nursing or may become pregnant — and for the elderly.

Abstract
It is estimated that >90% of Americans do not consume sufficient dietary vitamin E, as α-tocopherol, to meet estimated average requirements. What are the adverse consequences of inadequate dietary α-tocopherol intakes? This review discusses health aspects where inadequate vitamin E status is detrimental and additional vitamin E has reversed the symptoms. In general, plasma α-tocopherol concentrations <12 μmol/L are associated with increased infection, anemia, stunting of growth, and poor outcomes during pregnancy for both the infant and the mother. When low dietary amounts of α-tocopherol are consumed, tissue α-tocopherol needs exceed amounts available, leading to increased damage to target tissues. Seemingly, adequacy of human vitamin E status cannot be assessed from circulating α-tocopherol concentrations, but inadequacy can be determined from “low” values. Circulating α-tocopherol concentrations are very difficult to interpret because, as a person ages, plasma lipid concentrations also increase and these elevations in lipids increase the plasma carriers for α-tocopherol, leading to higher circulating α-tocopherol concentrations. However, abnormal lipoprotein metabolism does not necessarily increase α-tocopherol delivery to tissues. Additional biomarkers of inadequate vitamin E status are needed. Urinary excretion of the vitamin E metabolite α-carboxy-ethyl-hydroxychromanol may fulfill this biomarker role, but it has not been widely studied with regard to vitamin E status in humans or with regard to health benefits. This review evaluated the information available on the adverse consequences of inadequate α-tocopherol status and provides suggestions for avenues for research.

This research was supported in part by the National Institutes of Health.

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