@swfowkes
Thanks very much for joining this discussion and giving us your insight and chemical expertise.
By the way, I used to be an avid reader of your Cognitive Enhancement Research Institute (CERI) literature, many years ago. Alas, once you get ME/CFS, which I believe is probably driven by an enteroviral brain infection in many cases, you take a huge step backwards as far as cognitive enhancement is concerned: brain fog is the order of the day with this disease. Whereas before nootropics supercharged my brain, now with ME/CFS I need to take piracetam merely in a vain attempt to achieve normal cognition!
First, both the cation and anion of a salt create pH effects. Each has differential affinity for the hydroxide part of water and the proton part of water.
I appreciate that. So each salt will have its own pH when dissolved in water. I found
this article which seems to summarize this nicely:
1) A salt of a strong acid and a strong base will produce a solution with pH = 7.
2) A salt of a weak acid and a strong base will produce a solution with pH greater than 7.
3) A salt of a weak base and a strong acid will produce a solution with pH less than 7.
4) A salt of a weak acid and a weak base produces a solution whose pH depends on the strengths of the acid and base which made the salt.
One question I would like to ask: when it comes to acids, bases and aqueous solutions of salts, is there anything analogous to the conservation of energy law of physics? For example, if I have 100 ml of solution at pH 6, and 100 ml of another solution at pH 8, when I mix these together, will they always come out at the same resultant pH, no matter what the solutions are?
Second, the terms acid, acidifying and alkaline, alkalinizing have a non-chemical meaning in the context of biological systems and metabolism.
If I understand you correctly here, you are hinting that since the body contains thousands of dynamic systems, and numerous different buffers that are dynamically acting to tightly control pH values in various compartments of the body, the effects of foods or supplements on body pH values cannot be modeled or calculated as if the body were just a collections of chemicals in a glass flask. Each food or supplement can affect many of these dynamic bodily systems, and thereby alter body pH values in a complex fashion.
Furthermore, the body is not a closed system with respect to acids and bases: as you know, the body can get rid of acidity by increasing the amount of carbon dioxide breathed out by the lungs, thereby reducing carbonic acid in the blood; plus acids or bases can be eliminated by the kidneys to help control body pH.
So I guess the fact that the body has thousands of dynamic processes, and is not a closed system with respect to acids and bases, makes it complex to try to model the biochemical effects that ingested foods or supplements have on body pH.
As an aside, I also wonder whether the health effects derived from alkalizing foods or supplements may only in part be due to changes in body pH. pH levels are tightly controlled in the body (eg, the blood is kept between 7.35 and 7.45 under normal circumstances), and if you go out of the normal pH ranges, then bad things start happening, like enzymes will fail to work; so any changes in pH made by an alkalizing regimen are very small.
Thus might it be the case that the effects of alkalizing are not just due to changes in pH, but also due to changes in the functioning of the dynamic systems (the pH buffer systems) of the body that maintain body pH values at precise levels?
For example, if you apply an "alkalizing force" to the body by taking ½ a teaspoon of sodium bicarbonate each day, that means in order for the blood pH buffer system (the bicarbonate/carbonic acid buffer) to maintain blood pH with precise limits, this blood buffer system will have to adjust your breathing such that less carbon dioxide is expelled with every breath, so that more carbonic acid-forming carbon dioxide is kept in the blood, to counteract the alkalizing effect of bicarbonate and maintain blood pH within its normal limits.
So alkalizing not only changes pH slightly, but also alters carbon dioxide metabolism, and no doubt other aspects of metabolism.
Experientially, there is no connection between the acidic or alkaline taste of a food or substance and its acid or alkaline metabolic effect. Lemon juice is very acidic (tart) on the tongue, but is substantially alkaline-anabolic-anaerobic in its metabolic effect.
Any idea of what it is within a lemon that makes it alkalizing in its metabolic effect? I find it hard to imagine that with all that citric acid in lemons, a lemon would have an alkalizing effect metabolically. It's easy to see how an alkaline substance such as sodium bicarbonate in solution could alkalize the body, but surely not citric acid?
Since I am new to this forum, I'd like any clarification from members as to whether this discussion is best kept as part of this thread or should be handled in a different manner.
Usually if a major subtopic emerges in a thread, and it goes on for several pages, the moderators may move that subtopic to its own thread. But for the moment, I should think it will be fine to continue with this alkalizing topic in this thread. We can always move these posts later.
It is scientific. (1) It is defined: the residue left over after combustion. (2) It is measurable: pH effects in urine, blood, tissue, cells and organelles (the latter two are exceedingly difficult). (3) It has been measured and found to be consistent. In other words, its predictions have been tested. (4) It has been systematized, and resulting predictions tested. (5) It has been applied practically, and clinically, with considerable success.
I can appreciate that the alkalizing or acidifying effects of foods or supplements may be measured, so it's scientific in this empirical sense. But I just have not seen any scientific explanation as to the mechanism by which various foods and supplements achieve their alkalizing or acidifying effects.
As you mentioned, the terms alkalizing or acidifying when applied to the effect of foods and supplements on the body don't have their normal chemical meaning. Nevertheless, there must be some underlying biological mechanism(s) that can explain why a given food or supplement is alkalizing or acidifying to the body, even if we don't yet know what this mechanism is.
I don't understand this definition of "ash" being the residue left over after combustion. If by combustion you mean oxidation, well, there's not a lot of that going on in the body as far as I am aware. The liver employs oxidation to breakdown some dietary components, but oxidation is not the universal fate of dietary components.
It is true that "ash" is not widely used by scientists in this field (biologists, physiologists, biophysicists) nor taught to physicians in medical school or in continuing medical education courses. But to the extent that I have discussed the issue with many scientists and alternative medical practitioners, the vast majority do readily understand the concept even if they do not have an intuitive or practical appreciation of it.
I have no problem in trying out a treatment such as an alkalizing diet to see what health benefits it might provide, especially if there are reports of good effects. It's not necessary know the biochemical mechanisms to obtain benefit.
I would actually like to follow an alkalizing regimen for 6 to 12 months; however, every time I try this, I get horribly lightheaded. I have speculated in
an earlier post that this lightheadedness side effect arises because of the brain's mechanism which dilates the cerebral blood vessels when the blood is acidic, and constricts the blood vessels when the blood is alkaline. This mechanism is keyed on the concentration of hydrogen ions in the blood.
So I think what happens is when the blood is made more alkaline, the brain constricts its blood vessels and the blood supply to the brain is chronically reduced, leading to a feeling of lightheadedness. Cerebral vasoconstriction is a known cause of lightheadedness. Do you think hypothesis might be correct?
I wish I could find a workaround for this lightheadedness, because I would like to try out an alkalizing regimen.