A little at first, dont get it on bare skin if you can help it, its not gonna burn your skin off but its not great for you either. Thats why you treat stuff and wait for it to dry.
I assume youre asking relating to hunting. In the spring it doesnt matter, turkeys cant smell. In the fall, if you were really concerned hanging them outside for a few days after or even one wash cycle would make it not noticeable. I personally also have an ozone machine, so anytime something becomes really offensive, I just run it through that on a cycle. Ozone is bad for gear though so I dont do it often.
I dont buy into the scent free industry personally. Now, dont get me wrong I dont go wearing cologne into the woods but if I dont shower I dont get worried because I play the wind to the best of my ability. Yeah I get busted sometimes, but its not that often. Ill take a little scent over ticks. What I try to avoid is doing things like pumping gas before hunting. Another thing I have seen is that scent free soap seems to help keep the bugs at bay, along with this stuff. I dont get eatn up like I used too.