I don't buy into that concept. While it's true that if your blood becomes acidic you are sick. It's more likely that your blood is acidic because you are sick. Our bodies have a pretty tight control over PH level and to think that what we put into our mouths could significantly modify our blood or tissue PH levels just doesn't seem very likely. And the flip side is that if you are too alkaline, you will also be sick. Nope, don't believe it.
Some of you may die, but that is a risk I'm willing to take.