The placebo effect is an effect that does not actually exist and cannot be measured.

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The placebo effect is a real phenomenon in which a patient's belief in a treatment or medication can lead to perceived improvements in their symptoms, even if the treatment itself has no active ingredients or therapeutic properties. Although the placebo effect can be difficult to measure and quantify, numerous scientific studies have documented its effects in a range of medical conditions.

The Placebo Effect Is an Effect That Does Not Actually