Hi Rick,
I started taking alpha lipoic acid about 3 weeks ago in tablet form because I could not swallow the large capsules. I saw the dentist at about the same time, so it was a rapid decay over a short time. I understand your point about xpecting a more slow uniform decay, thinking I had been taking the tablet form over a longer time.
So the rapid corrosion only started at exactly the same time I switched from capsules to tablets and started chewing the tablets. I did rinse my mouth afterwards, but I still had particles of solid ALP in my teeth.
I may be wrong in blaming the ALP, I can't prove it caused the decay, but it fits well into the timing. I thought I should warn people as others may get swallowing problems as they advance. ALP is a weak carboxylic acid, but it maybe that I am particularly vulnerable since the enamel has thinned or worn off in my teeth.
So I can only sound warning bells, to at least rinse you mouth well if you chew pills. Better safe than sorry.
Ron