Prejudices die slowly.
The ideas the public has about chocolate seem impossible to change. Chocolate's image improved when it was discovered that it naturally contained a blandly stimulating chemical. Then chocolate was found to have an effect on serotonin, the neurotransmitter responsible for our moods. But there's no need to look for neurological justifications to defend eating chocolate. The myths about chocolate harming the liver, causing acne or raising cholesterol are just that - myths, as long, of course, as consumption is moderate.