What Rina Green calls her 'living hell' began with an innocuous backache. By late 2022, two years later, pain flooded her entire body daily and could be so intense that she couldn't get out of bed. Painkillers and physical therapy offered little relief. She began using a wheelchair. Green has fibromyalgia, a mysterious condition with symptoms of widespread and chronic muscle pain and fatigue. No one knows why people get fibromyalgia, and it is difficult to treat. But eight months ago, Green received an experimental therapy: pills containing living micro-organisms of the kind that populate the healthy human gut. Her pain decreased substantially, and Green, who lives in Haifa, Israel, and is now 38, can go on walks ' something she hadn't done since her fibromyalgia diagnosis. Green was one of 14 participants in a trial of microbial supplements for the condition. All but two reported an improvement in their symptoms. The trial is so small that 'we should take the results with a grain...
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