500 mg of black licorice is equivalent to how many pieces of the candy?

The case report noted below which demonstrated a link between black licorice and ventricular tachycardia got me thinking about this. I'm a full on candy addict and can't help stuffing myself with various sweets.

Facts on Red Vines Black Licorice Twists:

4 pounds = 240 twists

Hence, 500 mg is equivalent to 66 twists.

Phew .... At a max of 10 twists a day, I think I'm safe. Nonetheless, anyone know of a candy-holics anonymous?