Ann Intern Med -- Ford et al. 143 (2): 116 Figure 2

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Figure 2. Concentrations of serum ${alpha}$ -tocopherol (top) and ${gamma}$ -tocopherol (bottom) among U.S. adults age 20 years or older by intake of vitamin E from the use of vitamin, mineral, or dietary supplements (1999–2000 National Health and Nutrition Examination Survey).