Not yet investigated
What we have so far
The other disposal route, and the one that works inside cells rather than in the gut — which is why it, not DAO, is the one that matters in the brain.
This star is on the map because the show intends to take the question apart properly — the trials, how it is actually tested, whether the thing sold is the thing studied. That work is not done yet, and nothing here should be read as a conclusion. When the investigation is published it will appear on this page.