I know people that swear by this. If you want the remote to your car to work and you’re a little out of its range, press it to your chin, and it’ll work from much farther away. There any evidence to base this claim on at all?
Here is a recent thread on the same subject
Wow if that’s your idea of recent, I wonder what you consider to be a long time ago 
Sure, the plural of anecdote is not data…but I’ll add my anecdotal evidence anyway.
The range on my keyless entry remote can be nearly doubled by putting it under my chin. I can extend it from 40 feet to about 75 feet by doing that.
I was a skeptic on this, until this past February, when I tried it. I was at the beach, in a flat, unobstructed area. I had the remote under my chin pressing it. When the truck finally responded, I marked the spot (with my feet, of course). I then aimed the remote at Tucker-babe’s truck. No response. I kept doing it until I got a response, then marked that spot. I told Tucker-babe about it (she was busy at this time un-tacking a horse). She, of course, didn’t believe it, until she tried it, using the places I had marked. Same results.