Wow!
When I read someone saying "diet has NOTHING to do with pH, health and well being" I am strongly moved to laughter! Sorry for it!
I assume you mean me. I stand by my statement that diet does not alter pH. I have linked to explanations for why this is so. If you choose to disbelieve it, then so be it. The other part that diet has nothing to do with health or well being is not something I (or anybody else) have implied or believe is true.
I suppose subconsciously a person expressing such concepts is really defending his bad diet practices, his love for trash food and his unwillingness to recognize more than 50% of all the people just in the USA is immersed in a real bad diet, obesity and chronic disease.
I am not an american. And I have no desire to defend my bad eating habits. I fail to see what relevance this has to an attempt at explaining how pH-regulation in the body functions. A well documented phenomenon that isn't even controversial.
How do kidneys take charge of balancing pH?
They work on filtering or adding bicarbonate to the blood. So the low or high blood pH must be altered for the kidneys to work. It means logically the blood pH DOES change (sorry for screaming! lol) The respiratory system also contributes to restore the correct blood pH level.[/QUOTE]
You are approaching an understanding of what goes on. From your writings it appears that you believe that pH regulation is working so slow, that pH would exceed the normal range. This is wrong. The mechanisms you describe (and the body's own bicarbonate buffer) work very fast. You will not obtain a pH of 8,2 in your blood by eating a teaspoon of sodium bicarbonate mixed with molasse (feel free to disbelieve me if you will).
How is it nutrients, poisons and medicines get into the blood stream? By the digestive system unless an injection is administered. If a person swallows bicarbonate water or other high pH intake such as greens, and other kinds of high pH food, it is absorbed into the blood and the pH consequentially raises or lowers depending on the pH values ingested.
It has to pass through the stomach , which has a very acidic environment (pH 3). It also takes time for nutrients to pass from the digestive tube and into the blood stream. There is plenty of time for the buffer systems in the blood, and the regulatory mechanisms in the kidneys and lungs to keep pH within normal range
Logically, during the process, the blood pH is momentarily changed. Yes or no? That is precisely why the system enters into pH compensation; because the blood pH is altered!
Let's become a little bit mathy, and use our basic knowledge about the bicarbonate buffering system.
This is the set of chemical reactions that are in equilibrium:
CO
2+H
20↔H
2CO
3↔HCO
3-+H
+
And this is the formula that connects pH and the concentrations of CO
2 and HCO
3-in the blood:
pH=pK-log([CO
2]/[HCO
3-]
pK=6,1 (look it up if you don't trust me)
From this equation we can calculate directly that when pH=7,4 the ratio between CO
2 and HCO
3- is (approximately) 1/20.
This translates into, that the equilibrium is shifted towards bicarbonate, which again means that there is quite a lot of bicarbonate in the blood already.
Let us now calculate the ratio between CO
2 and
HCO
3- at pH = 8,2:
log([CO
2]/[HCO
3-]= pK - pH = 6,1-8,2 = -2,1
This gives us that
[CO
2]/[HCO
3-]= 10
-2,1 which is the same as saying that ratio between CO
2 and HCO
3- = 1/126 (approximately).
So if you want to momentarily increase your blood pH from 7,4 to 8,2 you would have to instantaneously increase the concentration of bicarbonate considerably from a level that is already high. I'll leave it up to you to decide if a diet would be able to do that. If that is your firm belief, then so be it.
I asked the question to doctors at the Nutrition Faculty in my university and they clearly explained me the facts.
Food and any intake, whose pH value is not 7.0 will effectively change blood pH; not permanently of course, by the action of the balancing system, but it will.
Ask them how much the pH can change, and ask them for documentation (ie. scientific data or a textbook of physiology).
Oh! by the way: They also told me saliva pH follows blood pH and although there is a difference in values,( saliva is consistently lower than blood) the rate is maintained so it can be used to test, in combination with urine tests an average value for blood pH.
Run away from them and don't look back. Or ask them for documentation. There are lots of documentation that salivary pH is influenced by salivary flow rate. How do you imagine that stimulation of salivary production (for instance by imagining eating something deliciously unhealthy food) can change blood pH? This silliness would be the consequence of a correlation between salivary and blood pH.