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New Gene Therapy Promises Weight Loss Without Injections

11/10/2025

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Summary

Story summary

Scientists have developed a gene therapy that makes the body produce glucagon-like peptide-1 (GLP-1), potentially replacing weekly injections of current weight-loss drugs.
Fractyl and RenBio are testing their GLP-1 gene therapies in larger animals after successful mouse trials.
Fractyl's therapy yielded about 20% weight loss in obese mice, while RenBio's yielded about 15%.
Experts caution that these treatments may pose long-term pancreatic risks.

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Story summary

Scientists have developed a gene therapy that makes the body produce glucagon-like peptide-1 (GLP-1), potentially replacing weekly injections of current weight-loss drugs.
Fractyl and RenBio are testing their GLP-1 gene therapies in larger animals after successful mouse trials.
Fractyl's therapy yielded about 20% weight loss in obese mice, while RenBio's yielded about 15%.
Experts caution that these treatments may pose long-term pancreatic risks.