4 ms·Another fun fact - heavy water has a sweet taste.by danbruc 2mo agoAnother fun fact - heavy water has a sweet taste.htrp 2mo agoHow did someone ever figure this one out?inigyou 2mo agoProbably by drinking it. As I said, it's only slightly toxic. Cody's Lab has done it on YouTube. 0.01% of the normal water you drink is heavy water.