These aren’t truly “bath salts,” they’re just packaged as such. The packages are so tiny that they wouldn’t do a thing if dumped into a normal-sized bathtub. My wife makes her own bath salts (*real* ones) using Epsom salts and essential oils, and when she uses them, it takes a few ounces dumped into the tub to make the nice smell in the bathroom. These things, IIRC, are sold in packages of just a few grams...not enough to make your bathwater smell good, but enough to give you a high if sniffed like cocaine.
}:-)4
Epsom salts are well-advised as a permanent part of any medicine cabinet. Soaking a wound or even a bee sting (as I discovered recently) in as-hot-as-you-can-stand-it water with epsom salts draws the poisons out of the wound or bite, promoting faster healing.
And when scented, epsom salts also make great bath salts just for relaxing. The use of epsom salts likely helped saved my foot when I was a kid and cut the foot badly on an old rusty oildrum.
I sure as heck wouldn't snort epsom salts!