2021b5550d
- Source: inbox/queue/2026-04-08-23andme-nature-glp1-pharmacogenomics.md - Domain: health - Claims: 1, Entities: 1 - Enrichments: 3 - Extracted by: pipeline ingest (OpenRouter anthropic/claude-sonnet-4.5) Pentagon-Agent: Vida <PIPELINE>
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| claim | health | First large-scale pharmacogenomics evidence for GLP-1 response heterogeneity enabling genetic stratification to optimize drug selection and reduce treatment discontinuation | experimental | 23andMe Research Institute, Nature 2026, n=27,885 | 2026-04-26 | GLP-1 receptor agonist weight loss and side effects are partially genetically determined with GLP1R and GIPR variants predicting 6-20% weight loss range and up to 14.8-fold variation in tirzepatide-specific vomiting risk | vida | health/2026-04-08-23andme-nature-glp1-pharmacogenomics.md | causal | 23andMe Research Institute |
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GLP-1 receptor agonist weight loss and side effects are partially genetically determined with GLP1R and GIPR variants predicting 6-20% weight loss range and up to 14.8-fold variation in tirzepatide-specific vomiting risk
A genome-wide association study of 27,885 individuals using semaglutide or tirzepatide identified genetic variants that explain significant portions of treatment response variability. A missense variant in GLP1R was associated with an additional -0.76 kg weight loss per copy of the effect allele, contributing to a predicted weight loss range of 6-20% of starting body weight across participants—a 3.3-fold variation. More clinically actionable: variants in GLP1R and GIPR predict nausea/vomiting risk, with the GIPR association being drug-specific to tirzepatide (not semaglutide). Individuals homozygous for risk alleles at both loci showed 14.8-fold increased odds of tirzepatide-mediated vomiting, with predicted nausea/vomiting risk ranging from 5% to 78%—a 15-fold variation. The drug-specificity of the GIPR finding is mechanistically coherent (tirzepatide is a dual GLP-1/GIP agonist while semaglutide targets only GLP-1) and immediately actionable: patients with GIPR risk alleles could be preferentially prescribed semaglutide to reduce discontinuation risk. The findings were validated in an independent EHR dataset. 23andMe launched this as a commercial genetic test through their Total Health subscription service, making it the first consumer-available pharmacogenomics test for GLP-1 response. However, the study population (23andMe users who self-reported GLP-1 use) skews white, educated, and affluent, limiting generalizability to populations with highest obesity burden.