The term "Autoimmune disease" encompasses a wide range of conditions characterized by varying clinical symptoms and potentially distinct biological features. These diseases arise from a malfunction in the immune system, leading to increased reactivity while simultaneously attacking the body's own "self" tissues instead of focusing on external threats.

The development of the immune system begins from infancy, and as soon as we are born, we encounter numerous immunological challenges from both external and internal sources. These challenges can come in various forms, such as through the air we breathe, the food we consume, or contact with substances that trigger immune responses in different organs and tissues. Essentially, from the moment of birth, our immune system is engaged in a continuous battle.

In the initial weeks to months after birth, we receive protection from substances called antibodies found in our mother's milk. These antibodies play a crucial role in educating our developing immune system to distinguish between self and non-self components. Some microbes are allowed to thrive in certain organs because they are beneficial, while others are targeted and eliminated by the immune system.

Throughout our lives, we are exposed to factors associated with industrialization that can harm the human immune system. These include various biologically active substances, chemicals like fertilizers and pesticides, and changes in dietary habits. Modern eating practices, such as formula feeding instead of breastfeeding, consumption of nutritionally deficient foods, and diets rich in refined carbohydrates and sugars, can compromise our immune function.

The widespread application of modern science and technology to human life has created a combination of factors that make us more susceptible to disease. These factors include the consumption of processed foods laden with synthetic additives, preservatives, and chemicals, as well as habits like smoking, excessive alcohol and drug use, dental procedures like root canals and the use of mercury-based fillings, unresolved infections, low-level chronic infections that escape detection in standard medical tests, unresolved health issues from childhood, excessive hygiene practices, indiscriminate immunizations, and genetic predisposition to certain disorders.