Cocoa tastes good and is healthy. A nice claim, to begin with

Cocoa tastes good and is healthy. A nice claim, to begin with.
Well, there's no accounting for taste; some like it, some don't.

But cocoa is definitely healthy. The active ingredient flavonol, contained in cocoa, protects against arteriosclerosis. Flavonol binds reactive, cell-damaging substances, the free radicals. Flavonoids are even said to be able to repair blood vessels to a certain extent. 

Anyone who thinks consuming cocoa in large quantities is good should note that everything in moderation is ok; excessive consumption of anything never helps. It's actually harmful. It just depends on the amount. But a nice cup of hot, real cocoa, perhaps with a bit of milk, instead of the usual coffee, is good for your health.