Aside from obesity and cavities, here is why you shouldn't eat too much chocolate:

• Chocolate in extremely large amounts can actually poison you. The poison comes from the roasted seeds of the Theobroma cacao plant
• The toxic components found in this are: methylxanthine, alkaloids, theobromine and caffeine
• The lethal dose to kill a person is = 1,000 mg/kg of the person's body weight

However, theobromine levels vary by chocolate type with cocoa powder and dark chocolate.