Say you do everything you can clothing, body, boots. What can you do about your breath, brush your teeth, use mouth wash. But that still doesn't smell good to deer Im sure. I never see this part covered in scent control. have I missed it, or are there things out there for it. Say you eat what ever your choice before your hunt, it will obviously have some "scent" that will spook deer. I would think this is where most scent would come from (assuming you have done all you can for everything else).

Call me a cynic, but what a load of crap.
The absolute BEST marketing tactic ever used to sell product is the TV deer porn industry. It is simply amazing how much crap is absorbed by viewers that is mostly expensive and of little real value.

"Common sense", as one poster put it, is probably the best approach to scent control.

I can't speak much to hunting deer on private land where pressure MIGHT be low. But I can say much about hunting very wary and hunter shy deer on public land. I feel that these deer are the toughest at getting close to year after year.

Over the past 3 decades, I have been to "deer school". I plan on going back again this Fall. Many times my instructors (deer) left me alone in our classroom. But over 200 times, I took one or more "teachers" for a ride in my truck at the end of class.

And the shots taken at these deer were close. The average bow shot is 19 yards in 216 kills.

I do not wear carbon suits but I do wear odor containing and waterproof rubber boots. I have worn leather and tennis shoes and been successful but only when I hunted that stand for the first time.
I keep my clothes washed in odorless detergent (All free and clear) and stored in a clean plastic tote.

But mostly I play the wind and am very careful to try not to touch anything while scouting or traveling to and from my stand.

Another thing I do that I know makes a difference, I keep noise, especially talking, down to practically ZERO.
Deer may see you, or smell you, but they CAN hear you for a LONG way off if you are noisy. And old smart deer usually pay attention.