Earlier quoted context omitted.
But this is likely also an attempt to market to people who think things like "but I don't want to be exposed to chemicals" while not realizing water is a chemical.
Very funny, but also flippant and glib. When people -- myself included -- say they have a problem with chemicals in food, they of course mean artificial chemicals: that is, compounds, preservatives, dyes, and flavors that are non-naturally present for that particular food item and were added for their shelf life, taste, aesthetic, or addictive properties. Next time you visit your grocery store, go read the ingredient…
4. Interactions are even harder to establish, since the possible different cocktails and biologies combinatorially explode. This is the primary reason for a precautionary principle in introducing new compounds into our diets.