Evidence for radiation hormesis comes from various experimental studies, epidemiological research, and observations. Some laboratory experiments on plants and animals have shown enhanced growth and longevity at low radiation levels. Similarly, certain human studies, like those assessing populations living in high natural background radiation areas, suggest lower rates of some diseases. However, the evidence is not universally accepted, and many studies show conflicting results. The controversy arises from differences in study design, radiation type, and biological endpoints measured.
