Posted by iHerb Customer on May 23, 2012 | Verified Purchase
I gave this brand a chance about 5 years ago, when I couldn't find my regular one and I was suffering from a cold to end all colds. After a few hours I was good and functional again, 2 days later it was all gone, and I never looked back. Now,I make sure I have a box at the beginning of every cold season and if I start taking it at the first symptoms, it stops it dead in it's tracks. Highly recommended. I gave it to a lot of my friends too, and now they swear by it.