Not yet investigated
What we have so far
The exit. It sends homocysteine into cysteine and glutathione, it needs B6, and it is the step that decides whether methylation and antioxidant defence compete.
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.