Jamieson Neurosome St. John's Wort is a gentle and effective herb that causes fewer side effects than conventional antidepressant medications. It is standardized to contain 0.3% hypericin and 3% hyperforin, the active ingredients in St. John's Wort. This means that you get the same amount in every capsule taken. This product provides relief of nervousness, restlessness, insomnia, and helps treat mild depression. It is also used for relief of neuralgia and chronic pain.