What maintains your heart rate? The sinoatrial node sets the beat, the autonomic nervous system tunes it, and genes including HCN4, SCN5A, and GJA5 shape pacemaker and conduction function. Learn the genetics of the heartbeat, the lifestyle levers that support it, and how the Precision Peptide Genetic Test maps your predispositions.

The AHCY gene clears S-adenosylhomocysteine (SAH), the built-in brake on methylation. Variants that slow AHCY can lower the SAM-to-SAH ratio and stall the methylation cycle, with effects that compound alongside MTHFR. Learn how AHCY works and how pathway-level genetic insight adds context.

High alkaline phosphatase (ALP) can reflect bone, liver, or biliary activity — and your baseline is shaped by genes including ALPL, ABO blood group, and GPLD1. Learn what an elevated ALP reading means, why healthy people differ, and how genetics adds pathway-level context to your provider conversation.

Aggression is roughly 40–60% heritable, shaped by genes such as MAOA (the "warrior gene" variant) and COMT Val158Met that govern dopamine and serotonin signaling. This article explains how these variants interact with environment, why genotype is never destiny, and what pathway-level genetic context can add.

Genetics account for 50–90% of acne susceptibility, driven by genes such as OVOL1 and IL1A that shape skin-cell turnover, oil production, and inflammation. This guide explains the biology of inherited acne risk and the lifestyle and skincare levers that influence how those tendencies play out.

The MTHFD1 rs2236225 variant reduces folate-processing enzyme activity, pushing the body to rely more on dietary choline. This guide explains how MTHFD1 and PEMT shape choline demand, why choline matters for methylation and brain health, and food-first strategies to meet higher individual needs.

Twin studies suggest 40 to 60 percent of physical-activity variation is heritable. Genes like DRD2, CADM2, and FTO shape exercise reward, movement propensity, and metabolic response. This article explains how genetics influences activity levels and how to combat sedentary behavior by working with your biology.

Twin studies estimate anxiety disorders are roughly 30 to 40 percent heritable, with a landmark 2001 meta-analysis near 32 percent. Genes like COMT, SLC6A4, and BDNF shape stress-response pathways. This article explains the genetics of anxiety susceptibility and why genes are not destiny.

The rs225014 C allele produces the DIO2 Thr92Ala variant, altering the enzyme that converts thyroid hormone T4 into active T3. Research links it to insulin resistance, osteoarthritis, and well-being questions. Learn what the variant does, what the evidence shows, and its limits.

Most ALS is sporadic, but 5 to 10 percent is familial and driven by genes including C9orf72, SOD1, TARDBP, and FUS. This article explains the genetics of ALS development, the difference between sporadic and inherited disease, and why clinical genetic counseling matters.

Allergic contact dermatitis is shaped by genes like FLG, NAT2, GSTM1, and GSTT1 that govern your skin barrier and how you detoxify contact allergens such as nickel and hair dye. Learn what the research shows and how pathway-level genetic insight adds context to trigger identification and provider-guided care.

IGF1R, the receptor for insulin-like growth factor 1, sits at the center of longevity biology, and variants that lower its activity are linked to exceptional lifespan. This article explains what centenarian studies found, how IGF1R connects to the FOXO3 variant rs2802292, and where pathway-level genetic insight fits.

The HTR1A gene shapes serotonin signaling that underlies mood, anxiety, and emotional regulation. Learn how the rs6295 variant and the COMT gene influence emotional intelligence and relationships, what the research really shows about temperament, and how pathway-level genetic insight supports self-knowledge and informed provider conversations.

OCD is roughly 40 to 50 percent heritable, with the glutamate transporter gene SLC1A1 as its most consistently implicated variant, alongside SLC6A4, COMT, and BDNF. This article explains the genetics behind obsessive-compulsive symptoms and how genetic context supports — but never replaces — evidence-based, provider-directed care.

Roughly 80 percent of pattern hair loss vulnerability is inherited, driven largely by the AR (androgen receptor) gene plus more than 350 other DNA variants. This article explains how genetics, DHT, and environment interact — and what pathway-level genetic insight can and cannot tell you about thinning hair.

MTHFR gene variants — C677T (rs1801133) and A1298C (rs1801131) — reduce folate-processing enzyme activity and can raise homocysteine, a marker studied in cardiovascular and pregnancy health. This article explains the associated health issues, what management really means, and how pathway-level genetic insight adds context without diagnosing anything.

About 90% of ALS is sporadic and 10% is inherited. This article explains how genes including C9orf72, SOD1, TARDBP, and FUS drive motor-neuron degeneration in Lou Gehrig's disease, the difference between familial and sporadic cases, and why genetic testing belongs with a neurologist and genetic counselor.

The GPX1 gene encodes an antioxidant enzyme, and its Pro198Leu variant (rs1050450) is associated with lower activity and altered oxidative-stress markers. This article explains how GPX1 variants relate to lifespan and health, the wider antioxidant network, and what pathway-level insight reveals.

HNF4A gene variants are statistically linked to ulcerative colitis, one form of inflammatory bowel disease, through the gene's role in the gut barrier. This article explains what HNF4A does, how variants like rs1800961 connect to IBD risk alongside NOD2 and IL23R, and what genetic insight can and cannot tell you.

The ADA gene codes for adenosine deaminase, the enzyme that clears adenosine — the molecule behind sleep pressure, attention, and inflammation. This article explains how the ADA G22A variant (rs73598374) shapes deep sleep and focus, its connection to healthy aging, and what pathway-level genetic insight reveals.

Genetics accounts for roughly 40% of the variation in blood calcium levels, driven by genes like CASR, CYP24A1, and GCKR that regulate calcium and vitamin D. This article explains how blood calcium is controlled, the health risks associated with genetic variation, and how to use pathway insight with your provider.

Atherosclerosis risk is shaped by named genes including LDLR, PCSK9, APOB, and the 9p21 region, alongside cholesterol, blood pressure, and lifestyle. This article explains how artery hardening develops, which genetic factors matter, and how pathway-level insight supports an informed conversation with your provider.

Aortic stenosis, a narrowing of the aortic valve, is shaped by aging and inherited biology. This guide explains how the condition develops and the key genes involved — NOTCH1 in valve formation and calcification, LPA and lipoprotein(a) as a powerful driver, and PALMD among emerging genome-wide signals.

The SLC2A2 gene variant rs5400 (Thr110Ile) alters GLUT2 glucose sensing and is associated with higher sugar intake in research studies, with downstream links to blood sugar, liver load, and weight. This article explains the biology, the limits of the evidence, and what pathway-level genetic context can add.