There are two types of ions – positive and negative. Positive ions are atoms that have lost one or more electrons due to a high energy impact. Natural forces that generate positive ions include the decay of radioactive minerals, radon gas, forest fires, lightning and ultraviolet rays.

Anions (or negative ions) are atoms or molecules having more electrons than protons and giving off what is known as a negative charge. In nature, negative ions are created with air molecules broken apart from sunlight, radiation, and moving air or water. Negative ions can be found in forests, near the ocean, and surrounding waterfalls. They have also been known to help relieve stress, alleviate depression and boost energy. Positive ions are considered harmful to the human body, while negative ions are considered beneficial.

Anion in air is like vitamin in food, greatly benefits people's health and everyday routine, therefore, it is also being referred to as vitamin in air, which can facilitate body growth and disease prevention, the benefits are different to different organs:

• To respiratory system: improves lung function. 30 minutes after anion intake, the lung is able to inhale 20% more oxygen and exhale 14.5% more carbon dioxide.
• To cardiovascular system: significantly reduces blood pressure, improves cardiac muscle function and nutrition, facilitates the dilation of capillary vessel and the rise of skin temperature.
• To nerve system: energizes whole body, improves sleep quality, eases pain and tension.
• To metabolism: activates different enzymes in body, reduces blood sugar level, cholesterol, increases blood calcium, urine amount, increases the amount of nitrogen and creatinine in urine, accelerates bone growth, prevents scurvy, rachitis, vitamin insufficiency.
• To blood: increases the number of white and red blood cell, hemoglobin, reticulocyte, blood platelet, globin, heightens PH reading, shortens blood forming time.
• To immune system: improves reflex system and endothelial system, enhances body's anti-disease ability.