Scale can easily cause gastrointestinal digestive and absorption dysfunction and constipation, and increase the incidence of gastritis and various stones. Dental calculus and periodontitis are often caused by scale; Can kill people. Legionella is hidden in the scale and there is still no vaccine to prevent it.
Moreover, the insoluble water in the scale is only relative. After the water is heated, some precipitates will dissolve, which will bring the heavy metal ions that form the precipitates back to the water, so that the content of heavy metal ions in the water exceeds the requirements of health standards, which is harmful to human health. For example, calcium carbonate and magnesium carbonate are easy to form stones when deposited in large quantities in the human body.