Miss Rose Perez's cardiologist brought up her concern to her fellow specialists, and they had a similar observation. Their cases of cardiomyopathy multiplied, and all were associated with Myrtle Shade. Cardiomyopathy is a disease of the heart muscle that makes it harder for the heart to pump blood to the rest of the body. It is one of the common adverse effects of illegal drugs, especially methamphetamines because it speeds up the heart rate and thus, putting stress on the heart, increasing the risk of its failure.
This concern caught the attention of the Department of Health, and so investigations were conducted. However, their claims of high antioxidant content and other health benefits were otherwise proven and not the suspicious addictive compound.