Anal fissure susceptibility is shaped by genes governing internal sphincter tone (NOS3), connective tissue strength (COL5A1), and tissue healing (MTHFR). This article explains how these pathways influence why fissures recur and how genetic insight adds context to an informed conversation with your provider.

Mastocytosis is a rare disorder in which excess mast cells release histamine, causing allergic-type symptoms. Most systemic cases trace to the acquired KIT D816V mutation, while HNMT and DAO variants shape histamine handling. This article covers symptoms, common triggers, and pathway-level genetic context.

Spleen disease often traces to inherited conditions affecting red blood cells or metabolism, including hereditary spherocytosis (ANK1, SPTB), sickle cell disease (HBB), and Gaucher disease (GBA). This article explains what the spleen does, key symptoms, genetic and non-genetic risk factors, and how pathway-level genetic insight fits alongside medical evaluation.

Paresthesia — tingling, numbness, and pins-and-needles — is influenced by genetics, including MTHFR variants affecting B12 and folate metabolism, SCN9A variants shaping nerve firing, and PMP22 affecting myelin. This article explains the genetic factors in nerve health and how genetic insight supports an informed provider conversation.

Albumin, the most abundant blood protein, has a genetically influenced baseline. The ALB gene, the GCKR variant rs1260326, and FCGRT-driven albumin recycling all shape your level. Learn what these named gene variants do and why pathway-level genetics complements, but never replaces, a provider's reading of your labs.

Creatine kinase (CK) levels are shaped by genes like CKM and ACTN3, not just your last workout. This article explains what CK measures, how the ACTN3 R577X variant influences exercise-induced CK, when a high result matters, and how pathway-level genetic insight adds context to muscle health.

Why do some people get hit harder by colds? Named gene variants such as CDHR3 (rs6967330), IFITM3, and IFNL4 influence rhinovirus entry and antiviral defense. Learn the biology of cold severity, what the research shows, and how pathway-level genetic insight adds educational context.

Excessive thirst, or polydipsia, can trace to genetics through the vasopressin water-balance pathway — variants in AVP, AVPR2, AQP2, and WFS1 — or through diabetes-risk genes like TCF7L2 and FTO. This article explains those pathways, other causes to rule out, and when to seek care.

Extraversion and introversion are roughly 40 to 60 percent heritable, shaped by dopamine and serotonin genes including DRD4, DRD2, COMT (rs4680), and SLC6A4. This article explains how these variants influence reward sensitivity and social temperament — and why genetics sets tendencies, not a fixed personality.

Genetics accounts for roughly 30–40% of how much sleep you need, shaped by variants in BHLHE41 (DEC2), PER3, CLOCK, ADRB1, and ADA. This article explains how these genes set your sleep-duration range and chronotype, and what the PlexusDx Precision Peptide Genetic Test reveals about your recovery pathways.

Susceptibility to Group A Streptococcus is shaped by immune genetics, especially HLA-DRB1 and HLA-DQB1 class II genes tied to rheumatic fever risk, plus innate immune variants. This article explains the genetic factors behind strep infection and complications, and the modifiable habits that lower everyday risk.

Creativity is polygenic, not a single gene. Variants in COMT, DRD2, and BDNF shape dopamine processing, novelty seeking, and neuroplasticity, tilting how you generate and refine ideas. This article explains the science and the evidence-based habits — sleep, exercise, novel learning — that enhance creativity across any genetic background.

DHT is the most potent male androgen, and how much you make and how strongly you respond to it are shaped by genes like SRD5A2 and the androgen receptor gene AR. This article explains DHT's role in male sexual health, the genetic factors behind imbalance, and how pathway-level 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 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.

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.

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.

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 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.

Growth hormone regulates metabolism, body composition, bone density, and tissue repair, and genetics shape how the whole axis behaves. This article explains what GH does, how variants in GHR, IGF1, GHRHR, and FOXO3 influence it, why balance beats maximization, and what pathway-level genetic insight adds.

Age spots (solar lentigines) form where UV meets your pigmentation genetics: MC1R and IRF4 variants decide how readily skin overproduces melanin in the sun. This article explains the genes behind sun spots, the gene-environment link, and evidence-based prevention and management.

NAT2 slow acetylator status — driven by variants like NAT2*5 (rs1801280) and NAT2*6 (rs1799930) — means your liver processes certain aromatic amines more slowly. Research links it to exposure-related risks such as bladder cancer in smokers. Learn what slow acetylator status means and how genetic insight adds pathway-level context.

The MTRR gene variant rs1801394 (A66G) modestly reduces recycling of vitamin B12 used to keep homocysteine in check, and its impact grows alongside MTHFR variants and low B-vitamin status. This article explains what MTRR does, which health associations research supports, and how pathway-level genetic insight informs a provider conversation.

Fainting, or vasovagal syncope, runs in families. A 2020 genome-wide study linked a variant near ZNF804A at chromosome 2q32.1 to reflex fainting. This article explains the genes behind fainting, when it signals a heart-rhythm problem, evidence-based prevention steps, and what pathway-level genetic insight adds to the conversation.

ApoB counts the cholesterol-carrying particles tied to cardiovascular risk, and genetics shapes your baseline. Learn how APOB, LDLR, and PCSK9 variants influence your levels, why ApoB can outperform LDL, and how the Precision Peptide Genetic Test adds pathway-level context alongside a blood test.

Chili pepper tolerance is partly genetic. Capsaicin activates the TRPV1 receptor, and variants in the TRPV1 gene — including rs8065080 — calibrate how intensely you feel the burn. Learn how genotype and habit shape spice sensitivity and what pathway-level genetics can reveal.