Who takes Multivitamin supplements? Research has shown that more than one-third of Americans take Multivitamins. About one in four young children take a Multivitamin, but adolescents are least likely to take them. Use increases with age during adulthood so that by age 71 years, more than 40 % take Multivitamins. Women; the elderly; people with more education, more income, healthier diets and lifestyles, and lower body weights; and people in the western United States use Multivitamins most often. Smokers and members of certain ethnic and racial groups (such as African Americans, Hispanics, and Native Americans) are less likely to take a daily Multivitamin.