Healthy skepticism does not mean unwillingness to believe. Skeptics base their beliefs on scientific proof and do not swallow information uncritically. No major lifestyle change should be based on any one study. Results should be independently confirmed by others. It plods along, taking many small steps, slowly building towards a consensus.
Studies have to be carefully interpreted by experts in the field.
An association of two variables does not necessarily imply cause and effect. As an extreme example, consider the strong association between breast cancer and the wearing of skirts. Obviously, wearing skirts does not cause the disease. Scientists, however, sometimes show an amazing aptitude for coming up with inappropriate rationalizations for their pet theories. Repeating a false notion does not make it true.