An overwhelming majority of what we eat is made from plants and animals. This means that composition of our almost entire food is chemicals from the realm of organic chemistry (carbon-based large molecules). Water and salt are two prominent examples of non-organic foodstuffs - which come from the realm of inorganic chemistry. Beside some medicines is there any more non-organic foods? Can we eat rocks, salts, metals, oxides… and I just don’t know that?
According to Wikipedia it is- but I agree after looking at its structure that it is not.
There are no carbon-hydrogen covalent bonds in the structure.
https://en.m.wikipedia.org/wiki/Carbonic_acid#:~:text=In chemistry%2C carbonic acid is,quite stable at room temperature.