I HEARD THAT DRINKING ALKALINE WATER CAN NEUTRALIZE EXCESS ACID, IS THAT TRUE?

Alkaline water is not a buffer and has low alkalinity. As such, it cannot neutralize very much acid. Many people have seen that just a small amount of soda can easily lower the pH of a gallon of alkaline water. To help put this into perspective, consider that 1 tsp of baking soda (sodium bicarbonate) can neutralize the same amount of acid as 10,000 liters of alkaline water at a pH of 10. This is a primary reason why medical professionals have been skeptical about “alkaline ionized water”. It simply wasn’t known that the benefit of this water is attributed to the dissolved hydrogen gas until around 2007.