I've been drinking 4 ounces of D2O every day since April 2019. I had a telomere test done last month and my genetic age decreased by four years. Slows bio-processes and decreases ROS.
It's based upon my pucker-factor. The LD50 is very high, but I don't have a lot of anecdotes from other habitual users. It seems to be working.
I heard a few years ago that it slowed phys-processes and I figured that could relate to the autophagic-benefits from fasting.
It's crazy expensive, though. I could save money by drinking a bottle of Bollinger Vieilles Vignes every week.
lol gotcha. I just did a quick search and the first thing I read mentions it being toxic in high concentrations.