Is cast iron tawa good for health?

Could you elaborate on why some people might question whether cast iron tawas are good for health? Are there specific health concerns or myths surrounding their use? Additionally, what are the benefits of using cast iron tawas in cooking, and how do they compare to other cookware materials in terms of health impact? Lastly, are there any precautions or maintenance tips that should be followed to ensure SAFE and healthy use of cast iron tawas?