Genetics glossary
What is SNP?
Quick answer
SNP: definition
A SNP (single-nucleotide polymorphism) is a variation at a single position in the DNA sequence — the most common type of genetic variation between people.
SNP, explained
SNPs are identified by “rs” numbers (e.g., rs1801133 for MTHFR C677T). Most have little or no effect; some influence enzyme function or traits.
Why it matters
Wellness genetic tests are mostly panels of SNPs.
Learn more
Related terms
FAQ
SNP FAQs
What is SNP?
Why does SNP matter?
Answers
Related questions
Our partner store
Shop 10X Health
Genetic testing, the 10X Health System and daily supplements — straight from the official 10X Health store. Save 10% through our links.
- Save 10%
New · Weight & metabolism10X Health Metabolism Genetic Test Shop now (opens 10X Health in a new tab; affiliate link) - Save 10%
Wellness genetics10X Health Methylation + Genetic Test Shop now (opens 10X Health in a new tab; affiliate link) - Save 10%
Personalized approachThe 10X Health System Shop now (opens 10X Health in a new tab; affiliate link) - Save 10%
Daily foundations10X Health Foundations Shop now (opens 10X Health in a new tab; affiliate link)
Affiliate disclosure: Live10X is an independent educational site. If you purchase through our 10X Health links, we may earn a commission at no extra cost to you. It never changes what we write. Read our affiliate disclosure.
See everything we coverThese statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.
Stop guessing. Start with data — and a plan.
Take the free wellness assessment to find your highest-leverage focus areas, then explore genetic testing when you're ready to personalize further.
“Shop 10X Health” is an affiliate link — we may earn a commission at no extra cost to you. Affiliate disclosure