So people who eat lots of chocolate are more depressive?

Personally I think that’s a very presumptive headline. It implies chocolate causes depression.

Within the article they say they’re not sure if it’s causation or just correlation. If the chocolate makes you depressed, or if your underlying depression makes you want to eat chocolate.

But the headline suggests that it’s pretty clear - chocolate makes you depressed. Bad writing all round.

See also cannabis and schizophrenia