Question 1

Do placebos work if you know they are fake?

Accepted Answer

Yes. In open-label placebo trials, patients told plainly that their pills contain no medicine still improve. A 2010 Harvard study of irritable bowel syndrome found 59 percent of honest-placebo patients reported relief, compared with 35 percent who received no treatment.

Question 2

How does the placebo effect work in the brain?

Accepted Answer

Placebos trigger the brain to release its own chemicals, including endorphins for pain and dopamine in Parkinson's patients. Blocking these chemicals cancels the effect, showing the relief is a genuine, measurable biological response, not imagination.

Question 3

What conditions can placebos actually treat?

Accepted Answer

Placebos ease symptoms controlled by the brain and nervous system, such as pain, nausea, and fatigue. They cannot cure infections, shrink tumors, or repair physical injury, so they work best as an adjunct to real medical treatment, never a replacement.

placebo

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