Not yet investigated
What we have so far
Two large trials gave it to smokers and had to stop early: more lung cancer, not less. The best-supported antioxidant hypothesis of its era, killed by its own test.
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.