

Those who need to know the pH value, might be a small minority, just like people with specific allergies. The size of the group doesn’t seem to be a deciding factor in these things. As long as the information benefits someone, it makes sense to include it.
On the other hand, delusional and paranoid people will always find a way to make stupid decisions. They are already using e-codes for that purpose, so I think we can just ignore them in this case.
Food additives. People are afraid of scary chemical names, but hiding them behind numbers doesn’t really help much. It just makes the ingredient list shorter.