english: While TiO2 is safe and inert, it's really inefficient if you keep drinking the catalyst, because then you have to continue to replenish it, even after a few uses.
non_english: Iako je TiO2 bezbedan i inertan, zaista je neefikasno ako kontinuirano pijete katalizator jer onda morate da ga dopunite posle svega nekoliko upotreba.