>>Their blood concentration of xylitol spiked quickly 100-fold...
I think Attia does a lot more good than harm, but he's got a bit of an attitude when it comes to correlative studies (not to mention his derision of food-consumption report nutritional studies), but that determination that dietary xylitol *is* absorbed into the serum should have gotten him to reconsider at least the base assumption that we humans absorb xylitol poorly. That might *still* be true in a comparative sense; could relative rates of absorbtion explain why it's so toxic to dogs (same thing happens to their hepatocytes as S. mutans - and not to ours) - or is something else going on?