This small-scale pilot study studied the potential benefit of taking a concentrated dose of anthocyanin 300 mg once a day for 3 weeks (purple corn extract) on blood pressure among untreated Peruvian adults with mild-to-moderate hypertension. A double-blind placebo-controlled randomized crossover trial using intention-to-treat analysis was conducted on 30 healthy men and women who received care at the Dos de Mayo Hospital (Lima, Peru) between September 2010 and August 2011. The 4-phase study compared blood pressure readings on placebo and on purple corn extract. Blood pressure readings decreased from baseline levels to end of study, especially after taking a purple corn extract capsule for 3 weeks, regardless of age, gender, body mass index level, or initial average blood pressure reading. Individuals who had higher blood pressure readings at baseline showed the most marked reduction in s...