Nothing in this category reached a strong grade. Two ingredients have narrow, specific uses worth knowing about; the rest is sold on pandemic-era momentum.
Nothing in this category reaches a grade we would recommend. Rather than promote the least-weak option, we are leaving this tier empty — the ingredients that exist are listed below, graded as we found them.
"Lung cleanse" and "lung detox" products — the lungs clear themselves via the mucociliary escalator, and no oral supplement has been shown to remove tar or reverse smoking damage. Cessation support does that; a capsule does not.
The benefit exists only in people who were deficient.
There is no mechanism for what these products claim.
Especially if it has lasted more than eight weeks.
We make this one. NAC at 1,200 mg and vitamin D3 — and given how little this category has behind it, the review is candid that two of its four actives are there on thin evidence.