Today, we live almost twice longer than the generations living in the beginning of the last century. Our life expectancy has increased 35‐70 years in the last 100 years. There are several factors which are important for our longer and healthier life. One very important factor is a better understanding of the human biology. Scientists are making new breakthroughs every day. Better understanding of human biology also taught us how to improve sanitation, hygiene and fight against diseases. In order to live a longer and healthier life, human body should be maintained in normal physiology without serious interferences with the environmental factors. Food and drugs play very important.
