The CDKN2B variant rs10811661 on chromosome 9p21 is one of the most replicated type 2 diabetes signals, likely acting through pancreatic beta-cell function. Learn what this locus does, why one variant is not destiny, and how the Precision Peptide Genetic Test frames your metabolic pathway context.

Arachidonic acid levels are strongly shaped by the FADS1 and FADS2 genes, especially the FADS1 variant rs174537, which controls how efficiently you convert dietary fats into AA. Learn how diet and genes interact, why AA is essential, and how the Precision Peptide Genetic Test frames your fatty-acid pathways.

Adiponectin is a fat-tissue hormone that improves insulin sensitivity and falls as body fat rises — low levels track with type 2 diabetes and cardiovascular risk factors. This article explains adiponectin biology, the ADIPOQ gene variants that set your baseline, and how genetic insight adds metabolic context.

Chromium supports insulin action and carbohydrate metabolism, and genetics shapes it through transport proteins like transferrin (TF) and metabolic genes such as TCF7L2 and FTO. This article explains how chromium moves through the body and what pathway-level genetic insight can and cannot tell you.

Blood EPA depends on both omega-3 intake and how efficiently your genes convert it. Variants in FADS1 and FADS2, tagged by rs174537, strongly influence how much plant-based ALA becomes EPA. Learn how the omega-3 pathway works and what it means for your dietary needs.

Methionine is an essential sulfur amino acid found in meat, fish, eggs, and dairy, and it powers the methylation cycle. This article covers dietary sources, methionine's metabolic role, and how methylation genes like MTHFR, BHMT, and CBS shape how your body uses it.

Shrimp allergy is driven by IgE antibodies against tropomyosin, a shellfish muscle protein, and shaped by named genes including IL13, IL4, and FLG. This article explains the immune pathway behind shellfish reactions, the role of the skin barrier, cross-reactivity, and how genetic pathway insight fits alongside allergist-led care.

Manganese is an essential trace mineral, and genetic variants in transporters such as SLC39A8 (rs13107325), SLC30A10, and SLC39A14 shape how your body absorbs and clears it. This article explains the key named genes, the link to oxidative balance, and where pathway-level genetic insight fits alongside provider care.

The rs1050450 (Pro198Leu) variant in the GPX1 antioxidant gene depends on selenium — the mineral that partners with iodine in thyroid hormone production. This article explains what the "G" allele changes, how antioxidant genetics connect to iodine metabolism, and what a pathway-level genetic test can and cannot reveal about your biology.

Ghrelin, the hunger hormone, drives appetite, fat storage, and energy balance — and genes like GHRL, GHSR, and FTO shape how much you make and how strongly you respond. This article explains the genetic factors behind ghrelin, what the research shows, and how pathway-level insight adds context.

Phenylalanine metabolism depends on the PAH gene and the BH4 cofactor pathway (GCH1, PTS, QDPR). Learn how these variants shape how you convert this essential amino acid, how predisposition is assessed, and what the Precision Peptide Genetic Test reveals about your metabolic pathways.

Blood glycine levels are strongly genetic: GLDC runs the glycine cleavage system, while SHMT1 and CPS1 shape synthesis and clearance. Low glycine tracks with cardiometabolic risk in population studies. Learn how these named gene variants work and how pathway-level genetic insight adds context to your health picture.

Food allergy vulnerability is shaped by skin-barrier and immune genes, most notably FLG (filaggrin) plus IL13, IL4, STAT6, and specific HLA types. These variants raise susceptibility rather than guaranteeing an allergy. This article explains the atopic march, what research shows, and how pathway-level genetic insight informs a provider conversation.

Genetic differences help explain why ginseng affects people differently. Gut bacteria, CYP3A5 (variant rs776746), and COMT (rs4680) shape how ginsenosides are absorbed, cleared, and perceived. Learn what these named variants do and how pathway-level genetic context supports an informed conversation with your provider.

Irritable bowel syndrome (IBS) affects about one in ten people and is a real gut-brain axis disorder, not “all in your head.” With 90 percent of serotonin made in the gut, variants in SLC6A4, TNFSF15, and SCN5A are linked to IBS. Learn the genetics and how it differs from IBD.

Genes like SLC22A5, BBOX1, and CPT2 shape how your body transports, produces, and uses carnitine, the molecule that ferries fat into mitochondria for energy. This article explains the carnitine pathways, the role of diet and methylation, and what your DNA can and cannot tell you about your energy metabolism.

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.

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.

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.

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.

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 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.