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Genomelink

Genomelink (https://genomelink.io/) is a personal DNA cloud where you find everything you can do with your raw DNA data. Unleash your DNA data.

Get 200+ traits, ancient ancestry, nutrition/fitness advice, family finder, and more. Our mission is to help people know and do more with DNA data. We create an infrastructure in consumer genomics.

08/19/2026

Allergic to dust mites? Partly in a single SNP.

Dust mites live in beds, carpets, and furniture and are a leading cause of allergic rhinitis. Researchers ran a replication study in 432 Lithuanians, doing skin-prick tests for common inhalant allergens (molds, cat and dog dander, dust mites, pollen) and genotyping the cohort.

Carrying at least one G allele of rs10174949 — a SNP near the ID2 (Inhibitor of DNA Binding 2) gene — was significantly tied to higher mite-allergy risk. Out of the broader study, 3 SNPs linked to multi-allergen sensitivity and 10 SNPs linked to specific allergen sensitivities, with 13 total replicating from prior European and North American GWAS.

Small cohort, but a useful piece of replication for personalized allergy treatment research.

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Reference: Genetic Loci Associated with Allergic Sensitization in Lithuanians.

08/17/2026

Injury-proneness has an actinin gene behind it.

Massidda and colleagues compared Italian professional football players with healthy male controls and tested ACTN3 — the gene that codes for alpha-actinin-3, a protein involved in muscle movement. Indirect muscle injury was defined as a complaint that kept the player out for at least a day; severity was the number of days they couldn't train.

Players with the XX genotype (essentially alpha-actinin-3-deficient) were more than 2.5x more prone to injury and more than 2x more likely to have severe injury than RR carriers. People with less alpha-actinin-3 don't have major muscle-structure problems — alpha-actinin-2 compensates — but they tend to have less muscle strength, which may be why alpha-actinin-2 can't fully cover during high-intensity work.

First study on ACTN3 deficiency and injury incidence/severity. Larger samples are needed to firm it up.

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Reference: ACTN3 R577X Polymorphism Is Associated With the Incidence and Severity of Injuries in Professional Football Players.

08/14/2026

Your short-term memory has a dopamine-receptor gene behind it.

Working memory is the brain's RAM — what lets you carry a conversation, hold a phone number, or run a quick mental calculation. Dopamine plays a key role; low dopamine in cognitive regions of the brain drags working memory down. Levels are shaped by COMT, dopamine transporters (DATs), and dopamine receptors (DRDs).

Researchers ran a GWAS on more than 700 healthy young Chinese adults and tested two kinds of working memory: digital (arithmetic-and-recall) and spatial (two cognitive tasks at once). Participants with the TT genotype at Taq1A or AA genotype at TaqIB of DRD2 had better digital working memory. The Taq1A T-variant is tied to fewer DRD2 receptors, which may mean less inhibition of dopamine release — more dopamine available, better working memory.

For spatial working memory, no statistically significant variants emerged after splitting by s*x.

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Reference: An association study on the polymorphisms of dopaminergic genes with working memory in a healthy Chinese Han population.

08/12/2026

Why some people never forget a face — partly genetic.

When you look at a face, your brain uses two streams: the shapes of individual features and the spatial layout between them — eyes, nose, mouth, chin. Researchers tested 15-to-17-year-old Japanese high schoolers using a part-spacing paradigm: original photos versus versions altered by swapping in someone else's mouth or shifting the spacing.

They cross-referenced sensitivity to facial changes with COMT genotype — COMT being a gene that metabolizes dopamine, with its Val158Met polymorphism previously tied to schizophrenia. Teens with the Met/Met genotype were significantly more sensitive to facial-configuration changes than other genotypes. When photos were flipped upside down, the effect disappeared — meaning this is about upright-face processing specifically.

Population-specific (Japanese high schoolers), so the size of the effect in other groups is an open question.

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Reference: Association between catechol-O-methyltransferase Val(1)(5)(8)Met polymorphism and configural mode of face processing.

08/10/2026

Indoor tanning addiction may track a dopamine-receptor gene.

Researchers enrolled 18-to-30-year-old non-Hispanic white women who'd used an indoor tanning bed at least once in the past 12 months. DNA samples were paired with questionnaires on tanning behavior to identify variants associated with addiction risk.

Two SNPs — rs4436578 and rs4648318, both in the DRD2 dopamine receptor gene — were significantly tied to higher indoor-tanning addiction risk. DRD2 sits at the center of reward-motivated behavior, and the same gene has been heavily linked to pathological gambling and drug abuse. The team found these variants paired with depressive-disorder symptoms predicted UV dependence.

Sample drawn from a narrow geographic area, so the findings are an early signal rather than a population-wide rule. Still, the dopamine-reward story is consistent with addiction biology more broadly.

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Reference: Genetic Associations with Indoor Tanning Addiction among non-Hispanic White Young Adult Women.

08/07/2026

Is musical ability really in your genes? Partly, yes.

It's estimated that about 40% of musical ability is genetic. In a 2012 study by Park et al., researchers analyzed a Mongolian population and found that half of the top 10 gene loci associated with musical ability were located at or near the UGT8 gene — which codes for a protein called UDP glycosyltransferase 8, known to play a role in the central nervous system.

Fun aside: high levels of that same protein are associated with Alzheimer's — and Alzheimer's patients, even after losing many other neurological functions, often retain their musical abilities.

The study didn't account for things like formal training, which obviously matters. So if karaoke isn't your genetic strong suit, don't give up — practice still gets you there.

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Reference: Comprehensive genomic analyses associate UGT8 variants with musical ability in a Mongolian population.

08/05/2026

Keeping weight off has FTO and MC4R behind it.

Losing weight is one challenge — keeping it off is another. The genetics of weight maintenance involves genes tied to metabolic adaptation, energy expenditure, and fat storage. Variants in the FTO gene are linked to increased appetite and reduced satiety, which can undermine sustained weight loss. MC4R variants shift energy homeostasis and eating behavior — mutations here often track with higher caloric intake and harder weight maintenance.

Lipid-metabolism genes — like those coding for adipokines and lipoprotein lipase (LPL) — also shape how the body stores and uses fat after weight loss. The whole network adds up to a lot of individual variability in long-term weight outcomes.

Polygenic studies looking at many variants at once give a more complete read on someone's predisposition than any single SNP — useful for tailoring approach instead of one-size-fits-all advice.

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Reference: Fat: an evolving issue

08/03/2026

Serum CoQ10 levels are partly genetic.

Coenzyme Q10 sits at the heart of the electron transport chain — the cycle that produces cellular energy — and the body makes less of it as you age. Researchers meta-analyzed two cross-sectional Northern German cohorts (FoCus and PopGen), totalling about 1,300 participants with a mean age of 53, looking for common variants tied to serum CoQ10 levels.

Top hits included rs686030 in TTC39B (tetratricopeptide repeat protein 39B), a gene involved in protein-protein interactions — relevant because CoQ10 biosynthesis happens in a multi-protein complex — and rs12480807 in HNF4A, which encodes a transcription factor that regulates metabolic genes and has been tied to diabetes. Other hits: rs17769758 in PRMT8, rs7141874 in MIR4708/FUT8, and rs898838 in MSGN1/KCNS3.

Several of the loci have been previously linked to neuronal diseases, suggesting CoQ10 levels share genetic real estate with neurology.

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Reference: Genome-wide association study of serum coenzyme Q10 levels identifies susceptibility loci linked to neuronal diseases.

07/31/2026

Why some people get the munchies may sit in CB1.

Researchers tested recreational ma*****na users across four conditions (placebo, THC, CBD, or THC+CBD). After dosing, participants completed an attentional-bias task — reaction-time responses to food and ma*****na stimuli, where higher bias suggests craving.

Attentional bias for both stimuli was significantly higher in people with two C alleles (CC genotype) at rs806738 in CNR1, the gene that codes for the cannabinoid CB1 receptor. The effect was similar across all four drug conditions — suggesting CC carriers may be more food-attentive in general, regardless of whether they'd just used cannabis. THC tends to stimulate appetite while CBD tends to suppress it, so high-THC strains are usually behind the classic munchies.

Caveat: the paper didn't separate food-only from cannabis-only attentional bias, so the food-specific story needs more work.

Curious where you land? Upload your DNA at Genomelink. Link in first comment ↓

Reference: Acute effects of cannabinoids on addiction endophenotypes are moderated by genes encoding the CB1 receptor and FAAH enzyme.

07/29/2026

Sprint speed may sit in a single gene called MORC4.

Researchers ran the first GWAS on sprint performance across three cohorts: Caucasian British football players, elite Russian speed-and-strength athletes, and healthy Polish women. Russian power athletes also gave muscle-fiber biopsies for functional analysis.

Twelve gene variants were tied to higher sprinting speed. The most replicated finding: the G allele of rs12688220 in MORC4, which showed up more often in sprinters than controls or endurance athletes, and was tied to a higher proportion of fast-twitch muscle fibers in Russian biopsies. This SNP has also been linked to pancreatitis (where the G allele is protective). MORC4 sits in a region involved in ion and water-channel control between endothelial cells, and expression rises after injury and stress.

Initial sample of 48 is small — but the multi-cohort design and functional biopsy data tighten the story.

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Reference: A Genome-Wide Association Study of Sprint Performance in Elite Youth Football Players.

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