Not yet investigated
What we have so far
Bricks of corneocyte and mortar of ceramide. Filaggrin mutations break the mortar, and they are the strongest known genetic risk for eczema — and for the allergies that follow it.
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.