Not yet investigated
What we have so far
TACT reported a modest benefit in diabetic patients and was criticised for its conduct. TACT2 was run to settle it and found nothing.
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.