Is drinking heavy or super heavy water poisonous or destructive to the human body?

[sao123]

Obviously there is naturally occurring D2O, but it's concentration in natural water is very low. D2O is not radioactive, although T2O is radioactive with a 12 year half life.

From the chemical bond POV, heavy water still has the same electron bond as regular water.
But from a chemical perspective, how might drinking significant volumes of heavy water affect normal biological processes? Water can have anywhere from 0 to 4 extra neutrons in heavy configurations...

 

[zzuupp]

From
https://www.ncbi.nlm.nih.gov/pubmed/10535697
"Higher concentrations (usually >20% of body weight) can be toxic to animals and animal cells."

 

[Alpha One Seven]

Yes it does damage to the cell walls and to the mitochondria.

 

[Ankur Saxena]

Yes it can damage your whole body ...