How long will a hair follicle tell on bath salts?

Hair follicle tests can detect substances like bath salts (synthetic cathinones) for an extended period, typically up to 90 days after use, depending on factors such as the frequency of use, individual metabolism, and hair growth rate. However, standard drug tests may not specifically test for bath salts unless they are designed to do so. It's essential to note that hair tests provide a historical record of drug use rather than a current state of impairment.