(guardian.co.uk): The point of science is that it can give us impartial answers to important questions. Doctors and patients can look at scientific evidence to help them decide what makes a healthy diet, or whether a drug can treat a particular condition. Scientific journals publish detailed reports of research, allowing readers to see for themselves that the studies were unbiased. Of course, there are other factors at work too. Researchers are only human, journals want to publish exciting new findings, and drug companies want to demonstrate that their products are effective. That's why scientific journals work hard to be transparent about conflicts of interest, and usually give information about how studies were funded.
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