I was hesitant to write this review because supplements are always iffy but, I feel compelled. If you are on the edge about this product, leap. I had covid and developed a pesky huff. Not quite a cough but, a dull weak whisper of a cough, like a huff or a puff. Particularly present at night or first thing in the morning. I tried EVERYTHING and I mean everything to no avail...I happened of these pills after days of searching for an all natural remedy. I am so grateful to have found these and want everyone to know that they actually do work. After a week, my huff had weaned down to a puff. After two weeks...completely gone and I can run the lake again. Just ordered another bottle.