Briatney Portillo, 20, said she had a heart attack after trying a TikTok trend called “dry scooping,” which is reminiscent of the 2013 cinnamon challenge. Dry scooping involves eating a scoop of dry, caffeinated pre-workout formula without first diluting it in water. In April, Portillo posted videos on her TikTok about her dry-scooping experience, including some from the hospital. She described what happened to her when she tried the trend and...