Stress causes the brain to boost production of the hormone cortisol, which impairs the function of T cells that fight infection, explains John Spangler, professor of family and community medicine at Wake Forest Baptist Medical Center in North Carolina. Getting support from friends, setting priorities, exercising regularly, and practicing relaxation techniques such as yoga can help relieve stress.
Very strenuous exercise called overtraining syndrome can weaken the body and make it more vulnerable to infections, according to a review in Acta Clinica Croatica.
The researchers warned that e-cigarettes are not safe because their vapor contains free radicals that can cause airway inflammation and impair responses to bacteria and viruses.
A diet rich in saturated fats weakens the immune system, and salt and sugar may also have negative effects, and obesity affects the immune system by reducing the number of white blood cells and their function to fight infection.
Immunity strengthening methods:
Avoid eating exposed foods and fast food.
Do not eat too much sugar.
Interest in eating vegetables, especially green leafy vegetables.
Take a zinc supplement.
Exposure to the sun for half an hour a day or take vitamin D.
Using healthy fats during cooking, such as ghee, olive oil and coconut oil.