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Table 4: Prevalence of National Health and Nutrition Examination Survey Participants with Biochemically Defined Vitamin B12 Deficiency* By Age Group, United State, 2001-2004.

Age Group
(Years of Age)
B12 ≤ 200 pg/mL and
MMA ≥ 270 nmol/L
B12 > 200 pg/mL and
MMA ≥ 270 nmol/L
9-13 years of age0.1%2.5%

14-18 years of age

0.2%3.7%

19-30 years of age

0.4%3.5%
31-50 years of age0.6%3.6%
≥ 51 years of age1.6%7.9%

*Biochemically defined vitamin B12 deficiency is serum B12 ≤ 200 picograms per milliliter (pg/mL) and methylmalonic acid (MMA) ≥ 270 nanomoles per liter (nmol/L) or serum B12 > 200 pg/mL and MMA ≥ 270 nmol/L

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