The health risks imposed by aluminum is not new, basically any heavy metal is bad at toxic levels. What is not fully understood is how much. Aluminum is everywhere, in your food, in your water, in your medicines. Theres always something new for the health conscientious to worry about. But its usually from people who understand less about biology. Whats interesting here is that you avoid aluminum grinders, yet smoke cannabis which is rich in chemicals. Including aluminum. Unless you vape, then ok.