No study has tested it. Here’s what is known.
No study has tested what sea moss does for the lungs, and no study has measured lung function after taking it. There is no human trial of eating sea moss for any purpose.
Some people find the gel soothing on a sore throat, and that is a real experience. It is also the kind of effect that a warm, thick drink — or a placebo — produces, which is why it would need a proper test before anyone could call it a lung treatment.
Stopping smoking is the only thing shown to let the lungs recover. Free help to stop smoking: smokefree.gov · 1-800-QUIT-NOW (1-800-784-8669).
Sea moss (Irish moss) · evidence checked 2026-10-23
Grades are calculated from the studies listed, by fixed rules.
No human study has tested it, and no study has measured lung function, cough or mucus after eating sea moss. Nothing undoes smoking damage except stopping.
A traditional use — the gel is soothing to swallow — but no trial has measured mucus, cough or congestion in people.