With the party trick version of this (eating lemons or limes straight), I was always concerned about the acidity on my teeth. Is that not a concern here because you just don't use as much acid?
The key is I'm not marketing this as a party trick. You already eat yogurt, coffee, fruit, chocolate without having to worry about the acid so there are no sudden differences here for your teeth. If anything, think about what removing sugar from your diet could do to your dental health.
This is a bad suggestion, teeth are a lot more vulnerable after acidic products and as far as I know brushing your teeth right after acidic foods is bad for your enamel.
But yes, I don't suggest people to eat lemons, but I think this product can be integrated with whatever you are already eating - Greek yogurt, fruit, coffee, etc.
Also, tangential, but I think the advice to brush your teeth right after is not right. Not a dentist, but IIUC, after exposing your teeth to acid, the enamel is in a weakend state and then the abrasion from brushing will do more damage. Rinsing with water would be helpful. Brushing before can also be helpful since the fluoride temporarily protects the enamel.