This is interesting because after some brief searching D-Lactate is being blamed for lots of things like making you feel bloated/sluggish, being a toxin in your blood, and causing memory issues.

I wonder if the old claims are flawed research or just some probiotic hippies spouting pseudo-science? I haven't found a good source of these claims except a few blog posts by "doctors" which I would say are questionable at best.

My dad is in the last stages, and it probably can't hurt to suggest he try to get more of this in his diet.