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Effect of steaming time on the polyglutamyl 5-methyltetrahydrofolate (5MTHF-Glun) species of carrot (D. carota): (A1) no steaming; (A2) steaming for 10 min; (A3) steaming for 20 min. The folate levels were determined by HPLC-MS/MS based on the methods reported by Wang et al.15 Data represent the mean of three replicates.
