well my 2 cents and not looking for a debate, scent control products can HELP , they will never fully eliminate human scent ,
as humans are always making ,making more
the carbon suits are designed to be re activated, and ALL things have an expration date on them
that is also why so called scents in bottles are dated!
shampoo and deodorant and what ever else will GO bad in time as well NOTHING is made to last forever!
BUT a LOT of things do last a LONG time if you DON"T break the seal on them all things spoil faster after opening than left sealed, as many things are added with chemicals that help preserve them but once air is added to the, they start to age faster!
I personally think the best best is to do what you can to make the least about of scent,
good shower with non scented cleaning products and some good old baking soda to help suck up some scent, and NOT breaking a sweat while walking in, NOT wearing cloths that are worn all over, MY hunting cloths always get put on before walking into stand and taken off when I get back to vehicle, and that's IT< never worn any where else
I have hunted this way for 20+ yrs and have had deer close enough to touch them countless times(many times they have actually touched me with there noses to see what I was) and in ALL wind directions
I won't say I am perfect with scent control as again we humans make scent , and most all animals find we STINK to them, and they can pin point us pretty good,
BUT you can do a LOT to limit the scent we give off! and help you get a slight edge! all the more so if you play the wind to your advantage too!