I spent a handy little chunk of change on this last night...
...with the hopes that it would miraculously eradicate my cold. It says it's clinically proven to drastically reduce the duration of your cold. It also asks you to drink plenty of fluids. What is it about fluids that makes your cold go away? We've been told since we were kids that you need plenty of rest and fluids. You drink lots of water, eat soupy things with chicken in them, consume teas with names like "Raspberry Sunshine" and "Citrus Starlight" ... but why? Do you expel the virus when you pee?
I decided the internet would best answer my question. I could have chosen WebMD, or Bio-medicine.org - both valid, knowledgeable databases of health information. I decided, though, on Yahoo Answers - the "homeless-man-who-knows-everything" of the internet.
I typed in "When sick, why do people say drink a lot of fluids?"
A few of my favorite answers (no corrections made to their posts):
Engrishman says: "the fluids can be swallowed easily, and there may not be digesion problem and the bad items, ill-bactiria will go out thr' urine and the other for which easy digesion and more water necessary. As the fluid contains major water and hence it is best suggested and in vogue."
WatsPunctuation says: "Because when you are sick you lose fluid through sweating from a fever and not eating because you don't feel well if you don't keep fluids in your system you will dehydrate and then you will have even bigger problems. Drink drink drink"
Apparently I'm in danger of being dehydrated. It sounds to me like that info applies more to a flu than a cold, but I'll err on the side of caution.