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Scientists call vitamin C is called "ascorbic acid" that means it gives scurvy, so you shouldn't take it.

Actually it was lemon juice at first; the switch to limes came later, when the age of sail was largely over and no-one was away from port long enough to get scurvy anyway. This meant no-one noticed that a) lime juice has much less vitamin C b) their method of preparation got rid of the rest.