Genetics & DNA
15 articles with genetic insights and evidence-tiered analysis.
5 Myostatin and Follistatin Variants That Predict Whether Peptides Build Muscle for You
Some people gain lean mass on every peptide protocol. Others barely respond. The difference is usually genetic. Here are the 5 variants that control your myostatin response and what each type should stack.
5 Genes That Predict Tendon Healing Speed: COL5A1, MMP3, and the Right Peptide for Each
Why do two people run the same BPC-157 protocol and one heals in 8 weeks while the other stalls at 20? Five genetic variants explain most of the gap. Here is how to find yours.
Why Nootropic Peptides Cause Brain Fog in 1 in 4 Users: The COMT, BDNF, and MTHFR Answer
One in four Semax users get brain fog instead of clarity. Three variants are associated with it: COMT, BDNF Val66Met and MTHFR. Here is how to know which group you are in before you dose.
Why Your IGF-1 Won't Go Up on Ipamorelin: The STAT5B Gene Nobody Talks About
IGF-1 flat despite a clean GH spike on ipamorelin or MK-677? STAT5B is the liver gene that converts your GH pulse into IGF-1 -- and partial variants silently block the translation.
Ipamorelin Not Working? The GHSR Gene Variant That Explains Every Non-Responder Case
Ipamorelin is hitting your receptor and your GH spike is real. But the GHSR variant nobody tests for is silencing the 50% of your GH signal that runs between injections.
GHR Exon 3 Deletion: The Gene That Predicts Your Growth Peptide IGF-1 Response
Why does your IGF-1 barely move on ipamorelin while someone else's jumps 80 points on the same dose? The GHR Exon 3 deletion explains more of that gap than protocol ever does.
Why Two People on the Same Ipamorelin Protocol Get Completely Different IGF-1 Results
If your IGF-1 barely moved on ipamorelin, it is probably not the dose. Two genetic variables explain 43% of why growth peptide IGF-1 response varies up to 3-fold between users.
MTHFR Brain Fog Still There? Nootropic Peptides That Work Downstream of the Broken Enzyme
Methylfolate works for some MTHFR carriers. For the rest, elevated homocysteine keeps suppressing BDNF no matter how much B9 you take. Semax changes the equation entirely.
Semaglutide vs Tirzepatide: Which Actually Works Better Based on Your GLP-1 Receptor Gene?
Why does tirzepatide produce 20% weight loss while semaglutide delivers 5% for the same patient? GLP1R and GIPR variants relate to both receptor pathways. 2026 data inside.
Akkermansia Gut Repair: Why Your Genetics Decide If It Works
Akkermansia is sold as a gut-repair supplement, but it does not patch your gut wall itself. Whether it can colonise you at all comes down partly to the genes that build the mucus it eats. Here is what the research actually shows.
Do Peptides Work After 50? How Your Aging Genes Change the Math
Do peptides work after 50? Yes, but the rules change. Three inherited differences decide which deficit is biggest for you, and therefore which peptide is worth buying first.
APOE4 Carrier? 7 Neuroprotective Peptides Ranked by Evidence
APOE4 triples your Alzheimer's risk and suppresses BDNF by 30 percent. But it makes you a better responder to Cerebrolysin. Seven peptides ranked by APOE4 failure mode.
Semaglutide Non-Responders: The Gene Behind the Gap
A 27,885-person study found the gene that predicts who loses weight fast on semaglutide and who barely moves. Your DNA already has the answer.
What Your 23andMe Data Can Actually Tell You About Peptides
Your 23andMe raw file is a survey of 650,000 known variants. Here is which peptide-response SNPs it reliably genotypes, what gaps exist across chip versions, and why the data is more useful than most realize.
Semaglutide and Your Genetics: Why Ozempic Works Differently for Everyone
10-17% of semaglutide users are non-responders. New genetic research — including a 27,885-person GWAS from 23andMe — reveals why. Your GLP1R, TCF7L2, and ARRB1 variants determine whether you'll lose 15% of your body weight or barely notice a difference.