article_snippet: I decided to take a look and my initial assumption was that there would be an effect and quite a strong one.
article_snippet: There are some weak effects in a naive correlation framework  but when we go to a more complex multivariate framework (i.e. we control for certain factors such as age, sex, location, etc) all this disappears.
article_snippet: The effects vary from mild - tiredness during the day and over-eating - to very serious, such as joint pains, stomach upsets, loss of libido and even aggressive behaviour.
article_snippet: There is an interesting question about what the effect of this will be.'