One reviewer says it's because you are not taking enough. It seems to work better than taking all of these ingredients and putting them in a supplement.

Yin qiao is a chinese herbal supplement sold in the u. S. It is an anti-viral and anti-inflammatory supplement. It also contains vitamin c and/or zinc. This supplement is a must-have for anyone who wants to avoid colds.

Sugar coated tablets are so much easier to * than the natural flavored ones that tastes horrible. My grandchild is able to take this without a problem.

Tastes great, cheap, doesn't work. My concern is the warning of causing cancer in the instruction. But at amazon site, this warning is not pictured/shown when selling.