Before we discuss which one of these acne products is the best, let's look at why it is that chocolate causes acne.  If you're wondering what we're talking about, then we'd like to say that chocolate is one of the many things that we suspect causes acne.  There is a strong link between acne and chocolate for many people, and the difference between acne sufferers and non-sufferers is that the former tend to eat chocolate more often than the latter.  The link between the two is that chocolate causes acne.  There is a compound in chocolate called methylxanthines, which is what is believed to cause acne.  In addition to that, chocolate contains sugar, which is also a factor in acne development.