GSK3B codes for an enzyme that sits at the crossroads of insulin signaling, mood regulation, and cellular stress. This article explains what GSK3B variants like rs334558 do, what the research shows, and how pathway-level genetic insight puts the gene in context — a guide, not a diagnosis.

Genetics explains roughly 20–30% of human lifespan, with genes like FOXO3 and APOE among the most studied. This article covers what longevity genetics really shows, the pathways involved, the lifestyle levers that move the needle, and how genetic insight adds context.

AST is a key blood marker of liver health, and genetics helps explain why it varies — the PNPLA3 I148M variant raises liver-fat storage independent of alcohol. This article covers what AST measures, the roles of PNPLA3, TM6SF2, and HFE, and how genetic and lifestyle context work together.

Fracture risk is strongly heritable, and named variants in COL1A1 (rs1800012), LRP5, WNT16, and VDR shape bone density and strength. This article explains the key genes, how they interact with nutrition and activity, and where pathway-level genetic insight fits alongside provider-led bone care.

The DRD2 and ANKK1 variant rs1800497 (Taq1A) influences dopamine D2 receptor density, reward sensitivity, and mood. This article explains what the variant does, what research links it to addictive behaviors and mood, and what the Precision Peptide Genetic Test reveals about your dopamine and reward pathways.

Autoimmune Addison's disease carries a strong genetic component, driven by immune-regulation variants in HLA genes, CTLA4, and PTPN22, plus rare single-gene syndromes like AIRE. This article explains the genetic risk factors for primary adrenal insufficiency and how personalized health reports add educational context.

How efficiently the body clears mercury depends on detox genes, especially the glutathione S-transferases GSTM1, GSTT1, and GSTP1, plus metallothionein and selenium pathways. This article explains how mercury is processed, why null gene variants raise retention and risk, its health effects, and how pathway-level genetic insight adds context.

Napping habits are shaped by circadian and sleep-regulation genes including CLOCK, PER3, ADA, and COMT. This article explains how these named variants influence sleep timing, sleep pressure, and daytime alertness, plus a general framework for building a nap routine that works with your genetic tendencies rather than against them.

FGF21 gene variants like rs838133 help shape your preference for sugar, carbohydrates, and how your metabolism responds to what you eat. This article explains what FGF21 does, how it interacts with FTO and MC4R, and what the Precision Peptide Genetic Test reveals about your appetite and metabolic pathways.

The FABP2 gene encodes fatty acid binding protein 2, and its Ala54Thr variant (rs1799883) has been linked to insulin sensitivity, triglycerides, BMI, and metabolic syndrome. This article explains what the FABP2 trait does, which conditions research associates with it, and how to use that pathway-level insight with your provider.

The MAOB gene encodes monoamine oxidase B, an enzyme that clears dopamine and generates oxidative byproducts. Variants like rs1799836 have been studied in Parkinson's disease, depression, chronic fatigue, and smoking behavior. This article explains the biology, related genes MAOA and COMT, and what pathway-level genetic insight reveals.

Fall risk has partial genetic roots: ACTN3 shapes fast-twitch muscle power for catching a stumble, while VDR and COL1A1 govern the bone density that determines whether a fall causes a fracture. This article explains the key variants and the proven strength, balance, and vitamin D strategies that reduce falls across every genotype.

Barrett's esophagus risk is shaped by developmental genes including FOXF1 on chromosome 16 and BARX1 near chromosome 9, plus reflux and weight. Learn how these variants influence esophageal tissue biology, why genetics is context not diagnosis, and how the Precision Peptide Genetic Test frames your pathway-level predispositions.

Processing speed — how fast the brain interprets and responds to information — is polygenic, shaped by COMT (rs4680), BDNF Val66Met, CADM2, and myelination genes. This article explains the genetic mechanisms, the lifestyle levers that support cognitive health, and what pathway-level genetic insight reveals.

Mucositis is a painful inflammation of the mucous membranes during cancer treatment, and genetics may help explain why susceptibility varies. This educational article covers inflammatory genes TNF, IL1B, and IL6, the methylation gene MTHFR, and what the PlexusDx Precision Peptide Genetic Test reveals about your inflammatory and methylation pathways.

Nausea susceptibility is partly inherited. The GDF15 gene, tied in 2023 research to pregnancy-sickness severity, and serotonin-receptor genes HTR3A and HTR3B shape how easily nausea is triggered. Learn what genetics reveals about motion sickness, pregnancy nausea, and everyday queasiness.

GCH1 builds tetrahydrobiopterin (BH4), the cofactor behind nitric oxide production and pain signaling — which is why one gene shapes both cardiovascular resilience and pain sensitivity. This spotlight explains what GCH1 does, what the research shows, and how the Precision Peptide Genetic Test maps it at the pathway level.

IL1B encodes interleukin-1 beta, a powerful inflammatory signal, and variants such as rs16944 and rs1143634 shift how much your body produces. Research links high-inflammation genotypes to gastric and gum conditions when a trigger is present. This article explains the pathway and how genetic insight informs a provider conversation.

Sugar cravings are partly written in your DNA. Variants in FTO (rs9939609) shape appetite, the sweet-taste genes TAS1R2 and TAS1R3 shape perception, and FGF21 influences sugar intake. Learn how these genes affect diet and health, and how pathway-level genetic insight helps.

Genes shape whether your blood clots too readily or bleeds too easily. Platelet-receptor variants in ITGB3 (rs5918) and P2RY12, plus clotting-factor variants like Factor V Leiden (F5) and prothrombin (F2), influence this balance. Learn the biology and how pathway-level genetic insight adds context.

The GCKR gene controls glucokinase in the liver, and variants such as rs1260326, rs780093, and rs780094 shift fasting glucose, insulin, and triglycerides together. This article explains the metabolic trade-off behind these variants, the gene-diet interaction, and why genetic testing offers context rather than a nutrition prescription.

The AHCY gene encodes S-adenosylhomocysteine hydrolase, a central enzyme in the methylation cycle. Rare AHCY variants are linked to elevated methionine, myopathy, and developmental issues, and AHCY works alongside MTHFR. Learn the biology, what research shows, and how pathway-level genetic insight adds context.

The SULT1A1*2 variant (Arg213His, rs9282861) lowers activity of a key sulfation enzyme in phase II detoxification, affecting how the body processes hormones, dietary phenols, and chemicals. This article explains what SULT1A1 does, what the *2 allele means, and how pathway-level genetic insight adds context.

The GABA-A receptor is the brain's main calming gateway, built from subunits encoded by GABRA2, GABRA6, and GABRG2, with GABA made by GAD1 and GAD2. This article explains how these genes shape anxiety, sleep, and the excitatory-inhibitory balance tied to healthy neural aging.

Pulmonary arterial hypertension (PAH) has clear genetic drivers: BMPR2 mutations appear in 70 to 80 percent of heritable cases, alongside ACVRL1, ENG, EIF2AK4, and other genes. This article explains the genetic risk factors, incomplete penetrance, family screening, and why early detection improves outcomes.