Each DNA testing service lets you download your raw genetic data file. Here's how for each provider:
SNPs (Single Nucleotide Polymorphisms) are individual DNA letter variations at specific positions in your genome. Your 23andMe chip reads hundreds of thousands of these positions and reports which letters you have at each one.
SNP density (SNPs per megabase) tells you how thoroughly each chromosome was sampled. Higher density means more data points on that chromosome. This is driven by chip design: some chromosomes have more medically or scientifically interesting regions, so the chip includes more probes there.
How to read this chart: Taller bars = more SNPs tested on that chromosome. Hover any bar to see the exact count and density. Chromosome 19, despite being small, has high density because it contains many disease-relevant genes (including APOE). The Y chromosome and mitochondrial DNA (MT) have fewer probes because they are smaller and inherited differently.
Practical use: If a health condition is linked to a specific chromosome, you can see how well that chromosome was covered. Low coverage means potentially missed variants. This chart is a confidence indicator for your results.
Each axis represents a neurotransmitter system scored 1-10. Higher = more activity/capacity in that system. The purple shape is your genetic profile; the dashed line is the estimated population average.
This chart is a simplification. Each axis is based on one or two SNPs, but these systems involve hundreds of genes. Think of it as a rough genetic tendency, not a diagnosis.
Bars show relative genetic risk on a 1-10 scale. Green (1-3) = low/average, Yellow (4-6) = mildly elevated, Red (7-10) = notably elevated. These are genetic predispositions only; lifestyle, environment, and other genes play major roles.
This tool cross-references your genotype at well-studied SNPs with published research on how those genetic variants affect supplement metabolism, absorption, and efficacy. Each recommendation is personalized to your DNA.
Recommended: Supplements where your genetics suggest clear benefit (e.g., methylfolate for MTHFR variants, CoQ10 for SLCO1B1 carriers).
Caution: Supplements that may interact unfavorably with your genetics or require dose adjustments.
This is not medical advice. Always discuss supplements with your healthcare provider, especially if you take medications. Gene-supplement interactions are one piece of a larger picture that includes diet, lifestyle, medications, and lab work.