[Stem cells and cell therapy: on the eve of scientific approach].

Cell therapy and the stem cells (SC) have become a popular topic during last time. The theme is cluttered with numerous publications of questionable reliability. Not all methods applied in praxis are founded on evidence-based research.

[Radioprotective effect of "light" water: doubtful validity].

Several publications have reported a radioprotective and immunopotentiating action of "light" water with low content of such stable isotopes as deuterium and 18O. Validity of these statements is the subject of the Letter to editors. Investigations of "light" water compare with that of water purified of a microelement.