Earlier this week top NHS bosses wrote a letter to the Professional Standards Authority expressing serious concerns about homeopathy. They warned of its lack of scientific foundation and anti-science message in an era of misinformation.

Homeopathic remedies are proven to be no more effective than a placebo, but for many of its defenders it has real therapeutic effects. In this episode we look at the power of placebo, why so many people swear by it and why its effectiveness is troubling for clinicians. We look at the specific list of health conditions that respond to placebo effects and explore their limitations with science journalist Erik Vance. We also speak to Julia Buckley, whose chronic pain took her on a bizarre journey via a Voodoo demon and a chorus of healing angels.