How radiation is harmful to us?

Answer 1

Radiation is never beneficial to a healthy human. Radiation in human means energy carried by a wave (electromagnetic waves) or a particle (proton, neutron, etc.) penetrates the human outer skin layer and gets absorbed by the cells, blood or water. The result is a nuclear reaction -- molecule bonds get broken or tissues get hot, for example. If that molecule is involved in cell division or protein replication, the long-term effect can lead to cancers. If the cell damage or heat generation is too intense for the body to repair itself fast enough, the organ ceases to function (imminent death). Chemotherapy is considered a very mild form of radiation, compared to exposure to cosmic rays or nuclear weapons, but Chemotherapy already has severe side effects, like losing hair and loss of appetite. X-rays in a hospital are milder still and exposure is temporary. Long-term exposure to the sun, without a constant application of SKF30 or better sunblock lotion or wearing a hat or polarizing sunglasses, will have a larger impact than infrequent X-rays -- skin cancers. Even without exposing to the sun, we are still exposed to background radiation from the air and soil (residual radioactive isotopes, such as radon). We cannot escape from radiation, but we can mitigate greatly to reduce the accumulated dose and radiation effects. Please see the related link.

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Answer 2

Radiation can harm us by damaging DNA within our cells, leading to mutations or cell death. This can result in various health effects, such as cancer, genetic mutations, and radiation sickness. Exposure to high levels of radiation can be especially dangerous and increase the risk of developing these health problems.