Not yet investigated
What we have so far
The commonest cause of iron deficiency in women of reproductive age, and the one nobody asks about before ordering the ferritin.
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.