Today it is used in Europe as a cure for treating mild to moderate forms of depression and toning agent for nerve anxiety. In a study with 20 random tests on ambulatory patients suffering from mild to moderate forms of depression, the results indicated that Hypericum perforatum proved more effective influence in comparison with placebo and show comparable efficacy to some standard antidepressants. Scientists suggest that the effect of improving mood is due to two compounds of the herb - hypericin, and hyperforin. It is believed that these compounds can inhibit the degradation of several neurotransmitters, including serotonin, which is partly responsible for the control of mood and emotion.
HAYA Labs St. John's Wort is standardized to contain 3% hypericin and comes in a package of 120 vegetarian tablets.