A new generation of anti-obesity medications are displaying striking results: drastically diminishing weight, without the serious side effects of previous medications.

These drugs have raised hopes the weight can be pharmacologically altered in a safe way, but some researchers are concerned about the drugs' high cost, and that these medications could feed into some societies' obsessions with thinness.

This is an audio version of our Feature: The ‘breakthrough’ obesity drugs that have stunned researchers

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