I don't buy into all that scent killer coverup soap, gum, I will help you kill a deer stuff.
There is such a thing asfragerance (sp)free shampoo's. They are made for people who are allergic to such things and have sensitive skin. I use this, easy to find at Target, Walmart and other places.
For bad breath, I brush with baking soda or look for toothpaste with none of them breath freshning crystals and stuff. I also breath out of my nose, even when walking to my stands I walk slow to not make alot of noise and also to pace myself and not begin to sweat and pant like a dog.
I use stuff on my clothes to kill the new scent by washing themand when they get nasty from dragging out a deer or whatever.. But they stay in a big space bag and only come out when its time to go to work. I take them back off when I get out of the woods and they stay in that bag with earth scent dryer sheets and spray the whole time. Will wash them about once a week. I do use earth scent spray on my boots as I don't feel like putting on boots get to my hunting spot at 5am and change boots again.
Biggest help for me hunting. I use the wind to my advantage, and always have several spots to choose from to help with this. If the deer is in front of you and the wind in your face, half your job is done for you. Now just aim without being seen and make your shot count.