This necklace emits negative ions that are known to help bolster your immune system, purify your blood and create a healty, happy vibe. Wearing a negative ion energy necklace is believed to enhance overall well-being by neutralizing harmful positive ions, potentially reducing stress and boosting energy levels. Negative ions are thought to improve mood and mental clarity, creating a calming effect that may alleviate anxiety. Additionally, these ions may help strengthen the immune system and increase oxygen flow in the body, contributing to better physical health and vitality.