9.30 Knowing the properties of H2O and D2O, do you think that D2O can be used for drinking purposes?

Heavy water (${D}_{2}O$) acts as a moderator, i.e., it slows the rate of a reaction. Due to this property of ${D}_{2}O$, it cannot be used for drinking purposes because it will slow down anabolic and catabolic reactions taking place in the body and lead to a casualty.