I use this product as a precaution and for me it works. I haven't had a cold in nearly 18 months and I used to get several a year that would wipe me out. I went to the local branch last week to be told it had been removed from the shelves just that morning. Ha! I thought and went to the next nearest branch; couldn't fault them, at least they were consistent as I was told the same. The closest I've come to a reason is "issues with the labelling" Anyone else? I've got a bottle of Vicks First Defence which I will use - but it is vile, smells strongly of Vicks which is not nice squirted up the nose, the pain at the back of my head was horrible. So, I hope Boots get this fixed asap and I will be watching and waiting.