Quick answer: The named ingredient is mullein extract. Traditional use is long, but clinical evidence for the finished product is lacking, the amount is not published and we know of no trials on it.
Mullein
Traditional use is not the same as clinical proof. General laboratory research on plant compounds does not show what a finished tincture does in people. See Mullein Explained.
The liquid base and strength
The carrier, extract ratio and amount are not published, so the formula cannot be compared with anything studied. See Herbal Extract Labels Explained.
Where it falls short
We do not claim the drops clear mucus, repair lung tissue, reduce inflammation or help any lung condition.
Bottom line
A single traditional herb with limited evidence for any specific outcome and meaningful label gaps. See our worth-it review and the references.