Remote patient monitoring software assist patients in getting access to better healthcare. But, there are other challenges that need to be combated in healthcare. The U.S. Drug and Food Administration has repeatedly warned manufacturers that many dietary supplements contain dangerous, experimental stimulants.

According to a latest report, 75% of supplements tested still contain the compounds. The study author Dr. Pieter Cohen, an associate professor with Harvard Medical School said that consumers rely on supplements for safe, natural ways to increase energy, improve workouts or lose weight. But, most consumers are unaware of the fact that supplements can be sold as if they give you energy, help you lose weight or just about anything, as long as these supplements do not claim to cure or treat diseases.

His team’s findings centered on four unapproved stimulants: DMAA, BMPEA, DMBA and oxilofrine. These four have become replacements for the stimulant ephedra, which the FDA banned from supplements in 2004. This step was taken because, reports revealed that it raised the risk for heart attack, stroke and death.

Between 2013 and 2016, the FDA found that 12 different supplement brands contained one or more of the four unapproved stimulants.