Selenium is an essential trace mineral, and genes such as SELENOP (SEPP1) and GPX1 shape how efficiently your body transports and uses it. This article explains the key selenoprotein genes, the thyroid connection, why balance matters, and where pathway-level genetic insight fits into nutrition decisions.

Flatulence comes from bacteria fermenting undigested carbohydrates, and genes like LCT, MCM6 (rs4988235), and FUT2 shape which foods trigger it. This article explains the genetic and dietary causes of intestinal gas, the lactose connection, and evidence-based ways to identify triggers and control excess gas.

Eating disorders are 40–60% heritable, shaped by genes and environment together. A landmark anorexia GWAS revealed both psychiatric and metabolic roots, implicating genes like HTR2A and BDNF. This article explains the genetics, the metabo-psychiatric model, and evidence-based, compassionate treatment context.

Contrast-induced nephropathy (CIN) is a temporary drop in kidney function after iodinated contrast dye, driven by oxidative stress in tissue with little oxygen to spare. Learn the real risk factors, why symptoms are often silent, how clinicians prevent it, and where variants like NOS3 and SOD2 add pathway-level context.

Insomnia is moderately heritable, and circadian clock genes like PER2, PER3, and CLOCK help set your sleep tendencies. This post explains whether insomnia is genetic, which variants shape sleep timing and restless legs, and how evidence-based habits still give you real leverage over sleep quality.

DHA is an omega-3 fat vital for brain and eye health, and your genes largely determine how much your body makes. This article explains DHA's role, the ALA-to-DHA conversion pathway, and how FADS1, FADS2 (rs174537), and ELOVL2 variants shape your DHA levels.

Adult milk tolerance is controlled by a regulatory variant (rs4988235) in the MCM6 gene that keeps the LCT lactase enzyme switched on. About two-thirds of adults worldwide are lactase non-persistent — a normal trait, not a disorder. Learn what your genetics reveal about dairy digestion.

Keratoconus thins and bulges the cornea into a cone, distorting vision, and genes like ZNF469 and VSX1 shape corneal structure. This article covers what happens to the cornea, the genetic and environmental causes, detection, evidence-based care, and where genetic insight fits.

Genetic factors help explain why facial wrinkles appear earlier for some people than others. Genes for collagen (COL1A1), collagen breakdown (MMP1), oxidative defense (SOD2), and sun sensitivity (MC1R) all shape skin aging. Learn what the research shows and how pathway-level genetic insight can inform a provider-guided prevention plan.

Eyelid inflammation, or blepharitis, is shaped by skin-barrier and immune genetics. Named variants in filaggrin (FLG) and near the HLA region influence eczema and rosacea, two common drivers. Learn the biology, what research shows, and how pathway-level genetic insight adds useful context.

The ACTN3 gene and its R577X variant (rs1815739) shape athletic performance by determining alpha-actinin-3 in fast-twitch muscle fibers. RR carriers lean toward power, XX toward endurance. This article explains the science behind the "sprint gene," why one in five people carry XX, and why genetics is not destiny in sport.

Nail biting (onychophagia) is a body-focused repetitive behavior with a partial genetic basis shown by twin studies. Candidate genes from grooming research — SAPAP3 (DLGAP3), SLITRK1, HOXB8 — plus COMT and serotonin variants shape the impulse and anxiety circuits involved. This article explains the biology and why behavior still matters most.

Thirst and hydration are partly genetic: AVPR2, AQP2, and AGT variants shape how your body senses dehydration and how much water your kidneys conserve. This article breaks down the vasopressin, aquaporin, and sodium-balance pathways behind individual fluid needs and how genetic insight can guide smarter habits.

Stress resilience is partly genetic. Named variants in COMT (Val158Met), FKBP5, and BDNF shape how intensely your brain and cortisol system react to pressure and how quickly they recover. Learn the biology of stress coping and how pathway-level genetic insight adds context to your resilience.

Alcohol sensitivity is driven mainly by two genes: ADH1B (rs1229984) speeds acetaldehyde production, and ALDH2 (rs671) slows its clearance, causing the alcohol flush reaction in 30-50% of East Asian people. This article explains the two-step metabolism, the key variants, and why sensitivity differs from tolerance.

Estradiol is essential to male libido, erectile function, and sperm production — and genes like CYP19A1 (aromatase), COMT, and ESR1 shape how you produce and clear it. Learn how estrogen balance works in men, what pushes it off, and how genetic insight adds context to your bloodwork and provider conversation.

ADHD is highly heritable, and dopamine-system genes like DRD4, SLC6A3 (DAT1), and COMT shape attention and focus. This article explains how these pathways work, what genetic testing can and cannot tell you about attention, and why ADHD remains a clinical diagnosis rather than a DNA result.

Some people develop blood clots far more often than others, and inherited variants in the F5 (Factor V Leiden), F2 (prothrombin), and MTHFR genes help explain why. Learn how coagulation genetics create a baseline risk, what triggers stack on top, and how pathway-level insight informs your provider conversation.

COPD risk is shaped by genes as well as smoking. SERPINA1, which encodes alpha-1 antitrypsin, is the clearest inherited driver and can cause emphysema even in nonsmokers, while HHIP, CHRNA3/5, and GSTM1 add smaller effects. This article explains the genetics and the proven steps that protect lung health.

GLP-1 is an incretin hormone that controls blood sugar by boosting insulin, suppressing glucagon, and reducing appetite — the pathway behind Semaglutide and Tirzepatide. This article explains the mechanism, the evidence, and the genes (GIPR, TCF7L2, FTO) that shape your baseline GLP-1 biology.

Lysine is an essential amino acid that supports protein, collagen, and carnitine-driven energy. Learn how high lysine affects health, how genes like AASS and SLC7A9 shape metabolism and absorption, and how to optimize intake with pathway-level genetic insight and provider guidance.