Not yet investigated
What we have so far
Two people with the same HbA1c can have completely different days. The average hides the swings, and the swings may be what does the damage.
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.