Oh-- yeah. “Acidic blood” is the latest alt-med boogyman. I’ve been told to “Alkaline” (yes, as a verb) to cure my insomnia. Since I am pretty desperate where insomnia is concerned (especially at 3:30am), I looked it up, but it was the BS it seemed at first whiff.
Nothing can make your blood acidic other than serious kidney disease. Your blood functions at pretty much a pH of 7.4, and anything outside of that causes catastrophe, so your kidneys keep your blood pH really tightly controlled unless they just can’t.
This is incidentally why the prime time for getting a yeast infection is right after your period, because vaginal secretions are slightly acidic, which is unfriendly to most yeast, and menstrual blood neutralizes them-- but also keeps up a flow that stops yeast from getting a foothold. It’s the one day of so that you’re not getting much flow, but the pH is still neutral, that the yeast get cozy. It’s also why vinegar and water douches are not, in fact, total BS, if you are a woman who gets repeated yeast infections right after your period, as I got taken to task for by a woman you was plagued by them (yeast infections, that is) until she began using a douche right after her period.
Anyway, apparently the whole “Your body gets acidic, and this is bad,” is a misunderstanding of something that’s not good for you, but not really harmful in the long run, since it’s more of a symptom than an actual disease: lactic acidosis. This is when lactic acid, which is a metabolic byproduct, builds up in your muscles instead of being eliminated. It mostly happens to people with kidney disease or metabolic disorders, but people who overexert themselves can experience it-- I think it happened to me once during a run at basic training.
It’s very painful, and I had a thing that started out feeling like shinsplints, then got worse, until my legs became numb. I made it back to our gear, but ended up sort of crawl-rolling to my spot, and just sitting during the cool-down. As feeling came back to my legs, it came in waves of pain. But it was gone in about 10 minutes.
Apparently, if I’d been even just a little dehydrated when I set out on the run, on one of the first pretty warm days in February in S. Carolina, it could have easily happened. I wasn’t in great running shape when I got there, and it was only about week 3.
But build-up of a metabolic byproduct is not the same thing as “Your blood is acidic.”
Also, the “alt-med” solution of drinking alkaline water and eating “foods that alkaline (sic) the body” obviously neutralize as soon as they hit stomach acid.