Positively charged ions do not have a positive effect on our physical and mental health. They are associated with an increase in allergies, infections, lethargy, depression, anxiety, suicide, and more. Conversely, negatively charged ions have a positive effect. They elevate our mood by increasing serotonin levels, they help stabilize blood pressure, increase the body’s alkalinity, strengthen bones, heighten immunity, accelerate physical recovery, they purify and clean the air, and more. Sodium chloride has the property of being able to convert positive ions into negative ions. As an example, in one cubic centimetre of air outside of a salt room there is about 600-700 negative ions. In more recent years doctors in Japan have found that the effect of having high levels of positive ions in the immediate environment can lead to a whole host of ailments. This is because we are surrounded by positive ions from electromagnetic fields generated by computers, mobile phones, and other electronic devices which can impair brain function and suppress the immune system causing symptoms such as; anxiety, breathing difficulty, fatigue, headaches, irritability, lack of energy, poor concentration and mental performance, nausea, vertigo, and increased levels of the hormone serotonin (which can be potentially harmful to the body in high levels). Positive ions can turn in to free radicals in the body which can damage healthy cells and increase the acidity of the blood. This is because they oxidise the cells, raising the levels of lactic acid which can cause many illnesses including cancer. Also the balance of the autonomic nervous system is thrown off and blood and lymph circulation declines which causes premature ageing.