A friend of my family's sent a huge arrangement of flowers for my birthday...The callah lilies were deep dark murky purple...Florist put purple dye in the water & the lilies suck up the purple water & turn purple...

   The heads of my callah lilies all fell off a few days later...I think the weight of the thick purple pigment dye inbalanced the delicate lily heads, & they fell off...Pigment has weight...

  When you get a brain scan they inject you with dye, which goes into your brain, & then they take a video picture, & can see the dye travelling through your brain & they decide if the dye is flowing well or is blocked or stuck...

  But, if pigment has weight & made the heads of my now purple callah lilies fall off, then isn't injecting dye into your brain dangerous? Yes...I think yes...Most definitely Yes...Pigment has weight...