The negative ions in nature's forests and waterfalls have many benefits for the human body. Negative ions, also known as negative oxygen ions, are negatively charged air particles and are known as "air vitamins" or "longevity factors." They are found in higher concentrations in natural environments such as forests, waterfalls, mountains and seaside. The following are some of the benefits of negative ions to the human body:

1. Improve air quality: Negative ions can adsorb, gather and settle pollutants and suspended particles in the air, thereby purifying the air, reducing dust content and making the air fresher.

2. Enhance respiratory function: Negative ions can improve the oxygenation of the alveoli, increase lung capacity, and improve the disease resistance of the respiratory system.

3. Promote blood circulation: Negative ions can enhance myocardial function, promote blood circulation, and have certain auxiliary therapeutic effects on hypertension, heart disease and other diseases.

4. Regulate the nervous system: Negative ions can regulate the cerebral cortex, relieve fatigue, improve work efficiency, and help improve sleep quality.

5. Enhance immunity: Negative ions can enhance human immunity and reduce the risk of infection with viruses and bacteria.

6. Bactericidal effect: Negative ions have a bactericidal effect, which can effectively reduce the spread of germs in the air and have a protective effect on human health.

7. Allergy relief: Negative ions can stabilize skin surface potential and reduce skin allergy symptoms.

8. Refreshing and refreshing: Negative ions can stimulate physiological reactions in the human body, invigorate people and enhance concentration.

In short, the negative ions in natural forests and waterfalls have many benefits for human health. They can help improve air quality, enhance respiratory function, promote blood circulation, regulate the nervous system, enhance immunity, etc. In our daily lives, we can increase our exposure to negative ions through outdoor activities and the use of negative ion air purifiers, thereby bringing more benefits to our physical and mental health.