What is an rsID Number?

An rsID (reference SNP ID) is like a genetic “ID number” used to identify specific spots in your DNA where variations, called SNPs (Single Nucleotide Polymorphisms), can occur. Scientists assign each SNP a unique rsID to track it across studies and databases.

Example:

rsID rs6265 is a variation in the BDNF gene.
About 20% of people carry the ‘T’ variant, which may be linked to lower production of a protein involved in brain function.

Sometimes, reports may list a SNP only by its location, like:

“Chromosome 11 Position 27658369”

This location refers to the same SNP — the rsID provides a simple, unique label for each genetic variation, making it easier to understand and discuss.

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