Nutrient shortfalls have health consequences that could impact daily life and overall wellbeing. National nutrition surveys show shortfalls in intakes of many nutrients. About one-third of American adults fail to get their average daily requirement for vitamin C even though vitamin C is relatively easy to obtain from foods; low intakes can lead to poor energy levels and weakness. More than 90 percent of adults fail to get their average daily requirement of vitamin E and many fall short in other vitamins and minerals, which can impact immune function. More than two-thirds of women of childbearing age have low intakes of iron, which can impair cognitive function, physical capability and endurance.
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