Radiation poisoning does damage primarily by temporarily breaking down water molecules they encounter in the human body, creating free radicals which then attack the organic components of the cell. Therefore susceptibility to radiation poisoning is correlated to body water content. The higher the water content, the higher the susceptibility.
Muscle is more water than fat. So lean people are more susceptible to radiation poisoning than fat people. men tend to have lower body fat than women, so men tend to be more susceptible to radiation poisoning than women. young people tend to have higher water content then older people, so younger people tend to be more susceptible than older people. so underweight infant boys tend to be most susceptible to radiation poisoning, while overweight older women tend to be the least susceptible.
Muscle is more water than fat. So lean people are more susceptible to radiation poisoning than fat people. men tend to have lower body fat than women, so men tend to be more susceptible to radiation poisoning than women. young people tend to have higher water content then older people, so younger people tend to be more susceptible than older people. so underweight infant boys tend to be most susceptible to radiation poisoning, while overweight older women tend to be the least susceptible.