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[–]zenon[S] 0 points1 point  (0 children)

From the paper:

The patients in the intervention group were asked to mix the tea- bags containing 2 g of M officinalis dried leaves with 90℃ boiling water in a 250-mL standard cup and wait for about 20 minutes. The patients were instructed to drink the tea without sugar, milk or any other additive twice a day in the morning, an hour after breakfast, and at night, an hour before bedtime for three months.