`  ==possible clarifications== It would be nice for this article to more clearly step through several points. 1. ``Radiation`` is not a single entity. An external source of low level gamma rays is a much different creature than ingested alpha emitters that chemically concentrate in a tissue.  Po-210 anyone? 2. The quantity and nature of evidence for, or against, hormesis at different levels might be presented for cellular level, organ level, animal data, and epidemilogical human data in a table with some reference links on each line?   3. Clear identification and discussion of the societal scale issue of genetic mutation and possible cumulative genetic effects separated, apart from the potential benefits for individuals. The societal question of subtle cumulative mutation becomes more pressing if hormesis is beneficial to individual lifespan or no immediate harm offered (shorter term) economic benefits from less costly nuclear power.`