Next, try to fill in the connections in this way not just for the explanation you favor, but also for alternative explanations. For example, consider studies that correlate increased vitamin use with decreased health. One possible explanation is that vitamins actually worsen health, or anyway that some vitamins (or taking a lot of them) are bad for some people. It is also possible, though, that people who already are in bad or worsening health may be using more vitamins to try to get better. In fact, this alternative explanation seems, at least at first glance, equally or even more plausible.