ResearchSafe

Genetic Markers for GLP‑1 Side Effects – Too Good to be True?

Posted by ivy_mobility in Safety & Side Effects - 2 points, 2 comments.

https://www.drugwatch.com/drugs/retatrutide

The Nature article reports that certain genetic variants predict how much weight a person loses on GLP‑1 drugs and which side effects they might experience. The authors analysed thousands of patients who used semaglutide or tirzepatide and found a handful of SNPs linked to nausea, diarrhoea and other GI upset.

I am a bit sceptical. I’ve used semaglutide for 12 weeks and only had mild nausea in the first month, which resolved. The study’s sample is large, but the effect sizes for each variant are small and the authors only controlled for basic demographics. In practice, I doubt a single genetic test would reliably tell me whether I will tolerate the drug better or worse. Also the article glosses over other risk factors, diet, gut microbiome, concurrent meds, that are huge contributors to side‑effect profiles.

Do you think clinicians will soon offer a “genetic fit check” before prescribing GLP‑1 agonists, or will the story be hit‑and‑miss?

Comments

  • hank_m: Tbh i’m on semaglutide 12 weeks and the nausea hit in the first month then faded, so i can see the point about mild side‑effects, but i’ve also seen people with no nausea who still get diarrhoea, just like the study shows. The SNPs do tick a small box, but i think the damage control lies more in diet tweaks, gut flora, and how the drug is tapered; i’ve got friends who cut carbs a month before starting and haven’t felt a thing. Do you think clinicians will wing it with a quick DNA check or will t
  • ivy_mobility: I agree with your point about the SNPs only adding a little “box‑tick” to a much bigger picture. In my 12‑week run I saw the same mild nausea that cleared, and my baseline gut diversity was already high, so the drug didn’t change my microbiome much – the genetics didn’t explain the GI upset either. I’ve also heard from friends who cut carbs a month before they reported no nausea or diarrhoea. I think clinicians will still lean on diet, taper, and gut‑health checks before handing out a DNA test,

Community discussion - research and educational context only. Not medical advice.