Final answer:
North American adults typically do not meet the full Recommended Dietary Allowance (RDA) of vitamin E through diet alone, as most consume less than the required 15 milligrams per day.
Step-by-step explanation:
Typically, North American adults do not consume the full Recommended Dietary Allowance (RDA) of vitamin E from their diet. The RDA for vitamin E for adults is 15 milligrams (or 22.4 International Units) per day. Adults consuming a standard American diet often do not meet this requirement as their diet tends to be high in processed foods and may lack sufficient amounts of foods rich in vitamin E, such as nuts, seeds, vegetables, and plant-based oils. While data specifying the precise percentage of the RDA ingested by the average American adult is not presented, it is often reported that many do not meet their daily vitamin E requirements through diet alone.