If you do any actual research, you'll find that activated carbon does absorb odor, including human odors (body odor produced from bacteria, primarily growing in sweaty, moist areas, as well as smoke, vapor, soap odors, etc.). It will absorb to the point where it becomes saturated, just like a sponge or a wad of paper towels. Once it's full, it is full. The process of "activating" carbon is a scientific/industrial process. It is NOT accomplished by taking saturated activated carbon and tumbling it in a clothes dryer. About the only thing that tumbling it in a dryer may positively accomplish is to physically break larger granules which may (or may not) expose unsaturated pores (most likely, however, those newly exposed pores will almost immediately become saturated with clothes dryer odor molecules). Without doubt, there is no way to "re-activate" it at home, unless you invest in a few hundred thousand $ worth of equipment. If you'd like backup proof of this, just drive to your local auto-body supply store and ask to see a pair of carbon respirator filters. Read the package. 8 hours is the typical duration of them. You open the plastic sealed baggie and you've got 8 hours. That INCLUDES not even using them in a harsh enviornment. NOWHERE will it state on that package that you can paint a car with them today and next week tumble them in your dryer and reuse them!
On the flipside, activated carbon spray (which is nothing more than granulated activated carbon suspended in near-pure water which will evaporate within a short amount of time leaving behind "ready to absorb" granules) DOES work. If you want proof, get your favorite work hat, drpo a pair of today's sweaty socks in it, and spray the crap out of it with some carbon spray, let it stand in the sun for a few minutes till the wetness goes away - you won't smell a thing as long as you don't disturb it.
I own carbon - activated clothes. Never re-activate them. I do keep them because I know those are the clothes that I spray the crap out of each morning and once during the day. That "brand label" reminds me not to toss them in the hamper next to my wifes white dress - those labels are NOT a HOAX or BS - they're there to save me from getting killed by my wife from blackening her clothes!
Ed