You hit it right on the head! Its the abusers that cause any problem! Taking too many or not reading the warnings or directions. Most of the problems came with people taking too much of it or not seeing their doctor before taking it. Most all the thermogenics sold have a warning an also contact your doctor before taking. Yeah grandma may have a heartattack but usually there is a problem prior to that. She could have CHF or one of the other many problems that can be associated with a heartattack. So again its the individuals responibility to either get informed or take risks that are their fault with no fault to others.