Ucalm 300mg 120 tablet produced by natures aid bulk case of 10 providing 1500 2100mg of st johns wort herb ucalm st johns wort extract 300mg ucalm is a traditional herbal medicinal product used to relieve the sypmtoms of slightly low mood and mild anxiety based on traditional use only each film coated tablet of natures aid ucalm contains 300mg of st johns wort extract equivalent to 1500 2100mg of st johns wort herb ucalm 300mg providing 1500 2100mg of st johns wort herb suita