Ordinary pure water has no distinct taste, but how about heavy water? Does it taste sweet, as anecdotal evidence going back to 1930s may have indicated? Why would this be the case when D2O is nearly identical chemically to H2O, of which it is a stable, naturally occurring isotope? These questions arose shortly after heavy water was isolated almost 100 years ago, but they had not been satisfactorily answered.
source https://phys.org/news/2021-04-heavy-sweet-people-mice.html
