¿Qué es el kratom, la “heroína de las gasolineras” que causa alarma entre las autoridades en EE.UU.?

Jeffrey Deaver, a 58-year-old retired logger from Washington state in the United States, has used the herbal product kratom for four years to relieve severe chronic hip and knee pain after failing to find other relief.

The substance, often referred to as the "gas station heroin," has increasingly caused alarm among United States authorities.