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Sana was convinced that "green tea helps in weight loss." She read online success stories and believed them. Every time a colleague who drank green tea looked slimmer, she said, “See! It works.”
Her friend Ali, a medical student, decided to dig deeper. He showed her research articles. Some studies, like a "12-week trial in obese women (PubMed ID: 26093535)", showed real weight loss and lower cholesterol after high-dose green tea extract. Another "systematic review (Cochrane, 2012)", however, found the effect was so small that it wasn’t clinically important. Other trials showed mixed results some with benefits, some with almost none.
Sana realized she had been falling into 'Confirmation Bias" only noticing evidence that supported her belief and ignoring the rest. The truth was more complex: green tea "can" help a little, but diet, exercise, and lifestyle matter far more.
Lesson: We must avoid confirmation bias by looking at all the studies, not just the ones that agree with what we want to believe.
