Growing up, my mom was a huge fan of this (very expensive!) product. She really believed that it worked and gave it to us kids at the first hint of sickness. Funny enough, it never worked.
During my studies for my microbiology degree at university, I did quite a bit of research on this product. Guess what? There is absolutely NOTHING in there that has been proven to help/decrease cold severity or duration. I even contacted the company and found out that the directions on the bottle aren't "optimal" and that adults should take this product for a minimum of four MONTHS to get the effects - SIX MONTHS for seniors. This equates to HUNDREDS of dollars! Cold FX has even done their own research and found that Cold FX does not help with severity/duration when taken at the first sign of cold symptoms (then why do they claim that on the bottle?!) This product is purely a placebo and false advertising. Do not waste your money on this, Chicks!

ive tried this a few times and find that it never works for me. didnt see a change.

I didn't find that these things did anything for me. Overall, I think the most effective thing that kept a cold away was just taking extra vitamin C and eating clean. Overpriced, waste of money.