Posted by iHerb Customer on May 16, 2010 | Verified Purchase
I have severe asthma and have been frustrated with wanting to exercise but not being able to breathe. This product seemed at first to be a "slow starter" but it is definitely worth the few (3-5) days it takes to "kick in." For the first time in years (30 or so) I am off all asthma medication. I take four tablets under my tongue several times during the day and sometime just take some extra "when I think of it"(!) to stay on top of my allergies. To me this is a "miracle" product. Be patient. It definitely works.