Bad bacteria in the intestines tend to multiply due to constipation, meat-lover, aging and stress. These bad bacteria can cause vasoconstriction and affect blood circulation. Once the blood flow is blocked, at least 60% of the immune cells live in the small intestine will not be able to obtain sufficient nutrients and oxygen. This will prevent the immune cells in the body from being transported to all parts of the body efficiently and reduce human body immunity.

Therefore, more intake of rich dietary fiber and trace elements such as various colours of fruits and vegetables can promote the digestion and absorption of food, improve the intestinal environment.​