What is on bath salts packaging to avoid drug laws?
4'-Methyl-α-pyrrolidinopropiophenone:  Although it has never achieved the same international popularity as its better-known relations α-PPP and MDPV, 4-MePPP is still sometimes found as an ingredient of grey-market "bath salt" blends such as "NRG-3". Bath salts (drug):  The drugs' packaging often states "not for human consumption" in an attempt to circumvent drug prohibition laws. Bath salts have also been similarly disguised as plant food, hookah cleaner, and other products.
"not for human consumption"