But not all of these products are created equal: Some can be downright dangerous, as unsettling news about the popular supplement kratom shows. On Tuesday, the Centers for Disease Control and Prevention (CDC) announced the discovery of 28 reported cases of salmonella — including 11 reported hospitalizations — across 20 states. The CDC hasn’t yet identified a common source of kratom that’s been contaminated and is recommending against its use entirely. The Food and Drug Administration (FDA) also sent out a press release on Tuesday about the supplement, reiterating its concerns on risks associated with kratom and noting that the agency is looking at “peer-reviewed research and a growing number of adverse event reports associated with kratom use, including 44 reported deaths.”