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A natural compound extracted from a medicinal plant has shown surprising promise against rheumatoid arthritis in rat studies, reducing joint swelling, protecting cartilage and calming immune responses responsible for chronic inflammation, according to ScienceDaily. Scientists discovered that the compound works by targeting a specific protein and restoring balance to fatty acid metabolism, revealing a previously underexplored way to fight the disease. The findings could lead to new therapeutic approaches for rheumatoid arthritis in humans, though further research is needed.