Genetics & Longevity Glossary

One of two or more alternative versions of a gene or genetic variant at a specific chromosomal location (locus). You inherit one allele from each parent, giving you two alleles at most positions in your genome.

Any chromosome that is not a sex chromosome. Humans have 22 pairs of autosomes and one pair of sex chromosomes (XX or XY). Most hereditary traits are encoded on autosomes.

Two nucleotide bases that are bonded together in the double helix of DNA, adenine pairs with thymine (A-T), and cytosine pairs with guanine (C-G). The human genome contains approximately three billion base pairs.

A thread-like structure found in the nucleus of cells, composed of tightly packaged DNA and protein. Humans have 46 chromosomes organized as 23 pairs. Chromosomes carry genes along their length.

A form of genetic variation where a segment of DNA is present in a variable number of copies compared to a reference genome. CNVs can include deletions or duplications of gene segments and can influence gene expression and disease susceptibility.

The molecule that carries the genetic instructions for the development, functioning, growth, and reproduction of all known organisms. DNA is composed of four nucleotide bases, adenine (A), thymine (T), cytosine (C), and guanine (G), arranged in a double helix structure.

An allele whose associated trait is expressed when even one copy is present. A dominant trait 'masks' the effect of a recessive allele when both are present in a heterozygous individual.

The portion of the genome composed of exons, the protein-coding sequences. Although the exome represents only about 1-2% of the total genome, it contains the majority of disease-causing mutations studied in research and clinical genetics.

A coding segment of a gene that is retained in the mature messenger RNA (mRNA) after introns are removed during RNA processing. Exons contain the sequences that are ultimately translated into protein.

The functional unit of heredity, a specific sequence of DNA that encodes instructions for producing a protein or functional RNA molecule. Humans have approximately 20,000–25,000 protein-coding genes.

The process by which information in a gene is used to synthesize a functional gene product, typically a protein. Gene expression is regulated by many factors including promoter activity, epigenetic modifications, and environmental signals. Not all genes are expressed in all cells or at all times.

The complete set of genetic material, all of the DNA, found in an organism. The human genome contains approximately 3 billion base pairs of DNA and is distributed across 23 pairs of chromosomes in each cell's nucleus.

A research approach that scans the genomes of large numbers of people to identify genetic variants (typically SNPs) associated with specific traits or diseases. GWAS studies have identified thousands of associations between genetic variants and common conditions.

An individual's genetic makeup at one or more specific locations in the genome, the alleles they carry. At a SNP, your genotype might be described as CC, CT, or TT depending on which nucleotides are present at that position.

A set of genetic variants (often SNPs) that tend to be inherited together because of their physical proximity on the same chromosome. Haplotypes are used in genetic research to track patterns of variation inherited from a common ancestor.

A statistical measure of the proportion of observed variation in a trait within a population that can be attributed to genetic differences between individuals. A heritability of 0.5 means 50% of the variation in that trait is genetically influenced. Heritability is a population-level statistic, not an individual-level guarantee.

Having two different alleles at a specific genetic locus, one inherited from each parent. For a SNP, a heterozygous individual carries one copy of the common allele and one copy of the variant allele (e.g., C/T).

Having two identical alleles at a specific genetic locus, both inherited copies are the same version. Homozygosity can occur for either the major (common) or minor (variant) allele at any given position.

A non-coding segment of a gene that is transcribed into RNA but is spliced out before the mRNA is translated into protein. Introns make up the majority of most gene sequences in the human genome. Some intronic variants can affect gene function by influencing splicing.

The non-random association of alleles at two or more loci, meaning they tend to be inherited together more often than expected by chance because of their physical proximity on the same chromosome. Linkage disequilibrium allows SNPs to serve as markers for nearby functional variants they travel with.

The frequency of the less common allele at a SNP position within a studied population. By convention, a variant must have a MAF of at least 1% to be classified as a SNP rather than a rare mutation. Common variants (MAF >5%) are the primary focus of consumer wellness genetic panels.

A change in the DNA sequence. Mutations can arise from replication errors, environmental damage, or other factors. Most mutations are neutral; some confer functional changes. In a clinical context, 'mutation' often implies pathogenic significance, while 'variant' is used more broadly.

The basic structural unit of DNA and RNA, consisting of a sugar, a phosphate group, and a nitrogenous base. The four DNA nucleotides are adenine (A), thymine (T), cytosine (C), and guanine (G). Their sequence in DNA encodes all genetic information.

The proportion of individuals carrying a given genetic variant who actually exhibit the trait or condition associated with that variant. Full (100%) penetrance means everyone with the variant shows the trait. Reduced penetrance, common for complex disease associations, means only a subset of carriers show the associated phenotype.

The observable physical, biochemical, or physiological characteristics of an organism, the result of the interaction between its genetic makeup (genotype) and its environment. Phenotypes include traits like height, blood pressure, and enzyme activity levels.

Describing a trait influenced by variation at many genetic loci rather than a single gene. Most complex traits, including body weight, height, cardiovascular risk, and metabolic tendencies, are polygenic. Each contributing variant typically has a small individual effect.

A numerical summary of an individual's genetic predisposition to a particular trait or condition, calculated by adding up the effects of many genetic variants (typically identified in GWAS studies). A higher polygenic risk score indicates greater genetic predisposition, but not certainty of outcome.

A DNA region upstream of a gene that controls when, where, and how much the gene is transcribed. Transcription factors bind to promoter regions to activate or suppress gene expression. Variants in promoter regions can affect gene expression levels without changing the protein sequence.

An allele whose associated trait is only expressed when two copies are present (homozygous). When paired with a dominant allele, a recessive allele's effect is typically not observed.

A position in the genome where a single nucleotide differs between individuals or populations. To qualify as a SNP, the variant allele must occur in at least 1% of the population. SNPs are the most common type of genetic variation and form the basis of most consumer wellness genetic panels.

A laboratory process that reads the complete DNA sequence of an organism's genome at a single time. WGS captures virtually all genetic variants, including rare mutations not targeted by SNP arrays. Primarily used in clinical and research contexts; increasingly accessible for consumer applications.

The complex of DNA and proteins (primarily histones) that makes up chromosomes in the cell nucleus. Chromatin structure regulates access to DNA, loosely packed chromatin allows gene expression; tightly packed chromatin (heterochromatin) suppresses it.

A cytosine nucleotide followed immediately by a guanine nucleotide in the DNA sequence (the 'p' denotes the phosphodiester bond between them). CpG sites are the primary locations where DNA methylation occurs in humans and are concentrated in regions called CpG islands near gene promoters.

An epigenetic modification in which a methyl group is added to cytosine bases at CpG sites. When methylation occurs at a gene's promoter, it typically silences that gene's expression. DNA methylation patterns are heritable through cell division and can be influenced by diet, lifestyle, and environmental exposures.

An algorithm that uses DNA methylation patterns at specific CpG sites to estimate biological age. Epigenetic clocks (such as the Horvath clock, Hannum clock, GrimAge, and PhenoAge) can predict biological age more accurately than chronological age for some health outcomes, and their 'ticking rate' appears to be partially modifiable by lifestyle.

The progressive, age-related changes in DNA methylation and other epigenetic marks that accumulate over time. Epigenetic drift contributes to loss of cellular identity, gene expression dysregulation, and is associated with the biological aging process.

The complete set of chemical modifications to DNA and associated proteins that regulate gene expression without changing the underlying DNA sequence. The epigenome varies between cell types, changes with age, and is influenced by diet, lifestyle, stress, and environmental exposures.

Protein structures around which DNA is wrapped to form chromatin. Chemical modifications to histones, including acetylation, methylation, and phosphorylation, regulate how tightly DNA is packaged and therefore how accessible genes are for transcription.

The addition of acetyl groups to histone proteins by histone acetyltransferases (HATs). Histone acetylation generally loosens chromatin structure, making genes more accessible for transcription and therefore increasing gene expression. The reverse process (deacetylation by HDACs) compacts chromatin and suppresses expression.

Small non-coding RNA molecules (approximately 22 nucleotides) that regulate gene expression post-transcriptionally by binding to complementary sequences in messenger RNAs and either degrading them or blocking their translation into protein. MicroRNAs are important regulators of development, differentiation, and disease.

RNA molecules transcribed from DNA that do not encode proteins but serve functional regulatory roles. Types include microRNAs, long non-coding RNAs (lncRNAs), and small interfering RNAs (siRNAs). Non-coding RNAs regulate gene expression, chromatin structure, and many other cellular processes.

A protein that binds to specific DNA sequences (typically in promoter or enhancer regions) and regulates the transcription of genes into RNA. Transcription factors can activate or repress gene expression and are key mediators through which intracellular signals translate into changes in gene activity.

Beta-carotene oxygenase 1, the enzyme encoded by the BCMO1 (BCO1) gene that converts beta-carotene and other provitamin A carotenoids from plant foods into retinol (active vitamin A). Common variants in BCMO1 can reduce conversion efficiency by up to 70% in some carriers, with implications for vitamin A status in those following plant-forward diets.

A cytochrome P450 enzyme encoded by the CYP1A2 gene, responsible for metabolizing caffeine (and many medications) in the liver. Common variants categorize individuals as 'fast' or 'slow' caffeine metabolizers, influencing how long caffeine remains active and its associated physiological effects.

Fatty acid desaturase genes encoding the delta-5 and delta-6 desaturase enzymes that convert shorter-chain omega-3 fatty acids (ALA) to longer-chain forms (EPA and DHA). Common variants in FADS1/FADS2 significantly reduce this conversion efficiency, making pre-formed EPA and DHA from marine sources more important for variant carriers.

Fucosyltransferase 2 gene, encoding an enzyme involved in gut secretory status. 'Non-secretor' FUT2 genotypes are associated with reduced vitamin B12 absorption efficiency and altered gut microbiome composition. Approximately 20-30% of people of European ancestry carry the non-secretor genotype.

A gene encoding a protein involved in regulating iron absorption through the hepcidin pathway. Common HFE variants, C282Y and H63D, are associated with hereditary hemochromatosis (iron overload). C282Y homozygosity causes clinically significant iron accumulation; heterozygosity modestly elevates iron stores. HFE genotype informs iron supplementation caution.

Methylenetetrahydrofolate reductase, a key enzyme in folate and one-carbon metabolism. MTHFR converts folate into its active form (5-MTHF) for use in methylation reactions. Common variants C677T and A1298C reduce enzyme activity, potentially affecting homocysteine levels, methylation capacity, and requirements for methylated B vitamins.

The study of how genetic variation affects an individual's response to nutrients, why different people may have different requirements for or responses to the same dietary inputs. A branch of nutrigenomics focused on the genetics-to-nutrition direction.

The study of the relationship between genetics and nutrition, encompassing both how genetic variation affects nutrient metabolism (nutrigenetics) and how nutrients affect gene expression. Nutrigenomics provides the scientific foundation for personalized nutrition approaches.

A network of biochemical reactions that process one-carbon (methyl) groups, essential for DNA synthesis, DNA methylation, and the production of key molecules including SAMe, creatine, and neurotransmitters. Key nutrients: folate, B12, B6, riboflavin, methionine. MTHFR is central to this pathway.

The protein encoded by the VDR gene that binds active vitamin D (1,25-dihydroxyvitamin D) and mediates its effects throughout the body. VDR is expressed in nearly every tissue. Common VDR variants (BsmI, FokI, ApaI, TaqI) affect receptor signaling efficiency and may influence optimal vitamin D status.

A cellular 'self-cleaning' process in which cells degrade and recycle damaged organelles, proteins, and other cellular debris via specialized membrane structures (autophagosomes). Autophagy is essential for cellular quality control, activated by fasting and exercise, and suppressed by mTOR. Its decline with age is now recognized as a hallmark of aging.

A measure of how old an individual appears to be biologically at the cellular and molecular level, which may differ from chronological age. Biological age can be estimated via epigenetic clocks, composite biomarker panels (PhenoAge), telomere length, or functional measures such as VO2 max. It is potentially modifiable through lifestyle.

A state in which cells permanently exit the cell cycle (stop dividing) but remain metabolically active and resist apoptosis. Senescent cells accumulate with age and secrete pro-inflammatory signals (SASP) that damage surrounding tissue. Both a tumor-suppressive mechanism and, when accumulated in excess, a driver of aging and disease.

The number of years elapsed since birth, calendar age. Chronological age is a significant predictor of average health outcomes at the population level but is an imperfect individual predictor because biological aging rates vary substantially between people.

A concept in longevity medicine describing the goal of shortening the period of illness, disability, or functional decline at the end of life, ideally to a brief period immediately before death, following a long period of maintained health and function.

A framework describing the key cellular and molecular processes that accumulate with age and drive biological deterioration. The 2023 update identifies twelve hallmarks: genomic instability, telomere attrition, epigenetic alterations, loss of proteostasis, disabled macroautophagy, deregulated nutrient sensing, mitochondrial dysfunction, cellular senescence, stem cell exhaustion, altered intercellular communication, chronic inflammation, and dysbiosis.

The portion of life spent in reasonably good health, free from serious disease or significant disability. Distinct from lifespan (total duration of life), healthspan captures the quality and function of years lived. Extending healthspan is the primary target of most modern longevity medicine.

A biological principle in which exposure to low or moderate doses of a stressor (toxin, radiation, exercise, heat, cold, fasting) stimulates adaptive responses that improve resilience and function, even though high doses of the same stressor are harmful. Exercise, caloric restriction, and intermittent fasting are considered hormetic stressors with longevity-relevant effects.

Chronic, low-grade, systemic inflammation that develops progressively with aging and is associated with virtually every major age-related disease. Inflammaging is driven by cellular senescence (SASP), gut dysbiosis, mitochondrial stress, epigenetic dysregulation, and immune aging. It is now formally recognized as a hallmark of aging.

The total duration of life from birth to death. Distinct from healthspan, which measures the years lived in good health. Maximum human lifespan is currently estimated at 115-125 years.

Selective autophagy of damaged or dysfunctional mitochondria, a specialized quality control process that removes impaired mitochondria before they can accumulate and impair cellular energy production or trigger inflammatory responses. Mitophagy is regulated by the PINK1-Parkin pathway and declines with age.

The homeostatic maintenance of the proteome, the complete set of proteins in a cell. Proteostasis requires coordinated protein synthesis, folding, transport, and degradation. Its loss (a hallmark of aging) leads to accumulation of misfolded protein aggregates associated with neurodegenerative conditions.

Chemically reactive molecules containing oxygen, including superoxide, hydrogen peroxide, and hydroxyl radical, generated as byproducts of normal cellular metabolism, primarily in mitochondria. At low levels, ROS serve as signaling molecules; at high levels, they damage DNA, proteins, and lipids (oxidative stress).

The age-related progressive loss of skeletal muscle mass, strength, and function. Sarcopenia begins in the third or fourth decade and accelerates after 60, contributing to metabolic decline, insulin resistance, frailty, increased fall risk, and reduced longevity. Prevention through resistance training and adequate dietary protein is a cornerstone of longevity medicine.

The complex mixture of pro-inflammatory cytokines, chemokines, matrix metalloproteinases, and growth factors secreted by senescent cells. The SASP drives local and systemic inflammation, impairs tissue function, and can induce senescence in neighboring cells. It is a primary mechanism by which senescent cells contribute to aging.

An enzyme complex that extends telomeres by adding new TTAGGG repeats to their ends, counteracting the shortening that occurs with each cell division. Telomerase is active in stem cells, germ cells, and most cancer cells, but largely inactive in most adult somatic cells.

Protective repetitive DNA sequences (TTAGGG repeats) at the ends of chromosomes that prevent chromosomal degradation and inappropriate end-joining. Telomeres shorten with each cell division and with oxidative stress. When critically short, cells enter senescence or apoptosis. Telomere length is a biomarker of biological aging.

A cellular energy sensor that is activated when cellular energy (ATP) is low, such as during fasting, caloric restriction, or exercise. Activated AMPK switches cellular processes from energy-consuming (anabolism) to energy-producing (catabolism) modes, activates autophagy, and is a key mediator of the longevity-relevant effects of caloric restriction and exercise.

A measurable biological indicator of a physiological or pathological state, including genes, proteins, metabolites, or other quantifiable characteristics. In wellness, biomarkers include cholesterol, glucose, HbA1c, homocysteine, vitamin D, and inflammatory markers. Biomarkers provide the current functional readout that genetic data provides upstream context for.

The proportional distribution of fat mass, lean mass (primarily muscle), bone, and water in the body. A more physiologically meaningful health metric than body weight or BMI alone, as it distinguishes the metabolically active lean compartment from fat mass and captures fat distribution (visceral vs. subcutaneous).

A peptide hormone produced primarily by the stomach that stimulates appetite and promotes fat storage. Ghrelin levels rise before meals and fall after eating. Caloric restriction increases ghrelin, one of the physiological mechanisms driving hunger during dieting.

An incretin hormone produced by L-cells in the gut in response to food intake. GLP-1 stimulates insulin secretion (glucose-dependently), suppresses glucagon, slows gastric emptying, and acts on brain GLP-1 receptors to reduce appetite. GLP-1 receptor agonist medications mimic and amplify these effects for diabetes and obesity management.

A class of medications that bind to and activate the GLP-1 receptor, mimicking and amplifying the effects of endogenous GLP-1. These medications (including semaglutide, liraglutide, tirzepatide) are used for type 2 diabetes and obesity management and have demonstrated cardiovascular benefits in high-risk populations.

A blood test reflecting average blood glucose levels over approximately the preceding 2-3 months, by measuring the proportion of hemoglobin that has become glycated (sugar-bound). Used to diagnose and monitor type 2 diabetes and pre-diabetes. A marker of long-term glycemic control and metabolic health.

A sulfur-containing amino acid formed as an intermediate in methionine metabolism. Elevated plasma homocysteine (hyperhomocysteinemia) is associated with cardiovascular risk, cognitive decline, and pregnancy complications. Homocysteine levels are influenced by MTHFR variants, dietary B vitamin intake (folate, B12, B6), and kidney function.

A condition in which cells fail to respond normally to insulin signaling, impairing glucose uptake from the blood. The pancreas compensates by producing more insulin (hyperinsulinemia). Over time, this can progress to pre-diabetes and type 2 diabetes. Insulin resistance is a central feature of metabolic syndrome and is associated with visceral fat accumulation.

A hormone produced by fat cells (adipocytes) in proportion to body fat mass that signals energy sufficiency to the hypothalamus, suppressing appetite and increasing energy expenditure. In obesity, leptin resistance develops, the hypothalamus loses sensitivity to leptin signals, impairing appetite regulation despite high circulating leptin levels.

The capacity of the body to efficiently switch between carbohydrate and fat as primary fuel sources depending on availability and demand. Metabolically flexible individuals transition readily between glucose and fat oxidation. Impaired metabolic flexibility is associated with insulin resistance, visceral fat accumulation, and cardiometabolic risk.

A cluster of interconnected metabolic risk factors that together significantly elevate cardiovascular disease and type 2 diabetes risk. Typically defined as three or more of: elevated waist circumference, high triglycerides, low HDL cholesterol, elevated blood pressure, and elevated fasting glucose.

A central cellular signaling hub that regulates cell growth, protein synthesis, metabolism, and autophagy in response to nutrient availability, growth factors, and energy status. mTOR activation promotes anabolism; mTOR inhibition (by fasting, caloric restriction, exercise, or rapamycin) activates autophagy and is associated with longevity in multiple organisms.

Peroxisome proliferator-activated receptor gamma coactivator 1-alpha, the 'master regulator of mitochondrial biogenesis.' PGC-1α activation by exercise and cold exposure drives the creation of new mitochondria and enhances mitochondrial function in muscle and other tissues. Its activity is central to the fitness and metabolic health benefits of regular physical activity.

Adipose tissue stored around the abdominal organs (liver, pancreas, intestines), as opposed to subcutaneous fat (beneath the skin). Visceral fat is metabolically active, secreting pro-inflammatory adipokines and free fatty acids. Elevated visceral fat is a stronger predictor of cardiometabolic risk than total body fat or BMI.

An essential omega-3 fatty acid found in plant foods (flaxseed, chia, walnuts, canola). ALA must be converted to EPA and DHA to exert most omega-3 biological effects. Conversion efficiency is typically less than 15% for EPA and less than 5% for DHA in humans, and is further reduced by FADS1/FADS2 variants.

A fat-soluble compound essential for the mitochondrial electron transport chain, serving as an electron carrier between protein complexes. Also a major endogenous antioxidant within mitochondria. CoQ10 levels decline with age and are reduced by statin medications (which inhibit its synthesis via the mevalonate pathway).

A long-chain omega-3 fatty acid primarily found in marine sources (fatty fish, algae). DHA is a structural component of neuronal membranes and photoreceptors, comprising 15-20% of fatty acids in the cerebral cortex. It is essential for brain development, cognitive function, and serves as a precursor to specialized pro-resolving mediators (SPMs) that actively resolve inflammation.

A long-chain omega-3 fatty acid found in fatty fish and marine algae. EPA competes with arachidonic acid for COX and LOX enzymes, reducing pro-inflammatory eicosanoid production. It is also a precursor to resolvins and other specialized pro-resolving mediators. High-dose EPA (4g/day) demonstrated significant cardiovascular event reduction in the REDUCE-IT trial.

A tripeptide (glutamate-cysteine-glycine) that is the body's primary intracellular antioxidant. Glutathione neutralizes reactive oxygen species, supports Phase II liver detoxification, and maintains the cellular redox environment. Levels decline 20-40% with age. NAC is its most accessible supplemental precursor.

A stable, bioavailable form of the amino acid cysteine that serves as a precursor to glutathione synthesis. Used clinically as an antidote for acetaminophen overdose and mucolytic agent. In wellness contexts, NAC supports glutathione replenishment, liver detoxification support, and antioxidant defense, particularly relevant for those with GSTM1 null variants.

A coenzyme essential for hundreds of metabolic reactions including those in the electron transport chain and Krebs cycle. NAD+ levels decline with age. It is also a substrate for sirtuins (longevity-associated deacetylases) and PARP enzymes (DNA repair). NAD+ precursors (niacin, NR, NMN) are studied for aging-related applications.

A family of polyunsaturated fatty acids characterized by a double bond at the third carbon from the methyl end. Includes ALA (plant sources), EPA, and DHA (primarily marine sources). Long-chain omega-3s (EPA and DHA) have the most robust human evidence for cardiovascular, anti-inflammatory, and cognitive health effects.

The phosphorylated form of creatine, stored in skeletal muscle and other high-energy tissues. Phosphocreatine donates a phosphate group to ADP to rapidly regenerate ATP during the initial seconds of high-intensity effort. Creatine supplementation increases phosphocreatine stores, supporting exercise performance and serving as an energy buffer in muscle and brain.

The body's primary methyl donor, synthesized from methionine and ATP. SAMe provides methyl groups for DNA methylation, neurotransmitter synthesis, creatine production, and phospholipid metabolism. Its availability is influenced by one-carbon metabolism efficiency, including MTHFR activity.

A family of NAD+-dependent enzymes (SIRT1-7 in mammals) that regulate gene expression, DNA repair, metabolism, and stress responses through histone deacetylation and other post-translational modifications. Sirtuins are key mediators of the longevity-relevant effects of caloric restriction and are targets of research into aging interventions.

The reduced (active antioxidant) form of CoQ10. Ubiquinol directly neutralizes reactive oxygen species within mitochondria and cell membranes. It cycles with ubiquinone (the oxidized form) as CoQ10 performs its electron carrier and antioxidant functions. Ubiquinol supplements are considered to have superior bioavailability, particularly in older adults.

An imbalance in the composition or function of the gut microbiome, characterized by reduced microbial diversity, overgrowth of potentially harmful species, or loss of beneficial communities. Dysbiosis is associated with intestinal permeability ('leaky gut'), systemic inflammation, metabolic dysfunction, and is now recognized as a hallmark of aging.

The comprehensive study of small-molecule metabolites, the products and intermediates of metabolic reactions, in a biological sample. Metabolomic profiles reflect the combined effect of genetic variation, dietary intake, gut microbiome activity, and physiological status, providing a functional readout of metabolic health.

The complete community of microorganisms (bacteria, fungi, viruses, and other microbes) and their genetic material living in or on the human body, particularly in the gastrointestinal tract. The gut microbiome influences nutrient extraction, immune function, inflammation, metabolic health, and even brain function through the gut-brain axis.

An integrative approach combining data from multiple 'omic' disciplines, genomics, transcriptomics, proteomics, metabolomics, and microbiomics, to build a more complete picture of individual biology than any single data type can provide. Multi-omics profiling is a frontier of precision medicine and personalized wellness.

The study of how genetic variation affects individual responses to drugs, including absorption, metabolism, efficacy, and side effect risk. Pharmacogenomics informs personalized prescribing decisions and is already clinically standard for some oncology and psychiatry medications. GLP-1 receptor agonist pharmacogenomics is an emerging research area.

A medical approach that tailors prevention, diagnosis, and treatment decisions to individual patients based on their specific biological characteristics, including genetic profile, biomarkers, environment, and lifestyle. Distinct from traditional medicine which applies population-average recommendations to all individuals.

The large-scale study of proteins, their identity, quantity, structure, and function, in a biological system. Mass spectrometry-based proteomics can now measure thousands of proteins from a single blood draw, adding a dynamic 'what your body is doing right now' layer to the more stable genetic information.

The study of all RNA transcripts produced by the genome, the transcriptome. RNA sequencing (RNA-seq) quantifies gene expression across the genome, providing a dynamic snapshot of which genes are active in a cell or tissue at a given time. Transcriptomics bridges static genetic information and the dynamic proteome.