rs1800497 · Dopamine & Reward
The Taq1A variant affects dopamine receptor density in the brain, influencing reward sensitivity, addiction susceptibility, and motivation.
This SNP is technically in the ANKK1 gene but affects the nearby DRD2 gene's expression. It determines the density of D2 dopamine receptors in the striatum. Fewer receptors (A1 carriers) means the brain needs more stimulation to achieve the same reward response, which has been linked to addictive behaviors and altered reward processing.
| Genotype | Status | What It Means |
|---|---|---|
| GG (A2/A2) | Normal | Normal D2 receptor density. Standard reward sensitivity. |
| AG (A1/A2) | Carrier | Reduced D2 receptor density (~20-30% fewer). Slightly elevated reward-seeking behavior. |
| AA (A1/A1) | Homozygous | Significantly reduced D2 density (~40% fewer). Higher susceptibility to addiction and compulsive behaviors. |
A1 carriers should be aware of heightened addiction susceptibility. Healthy dopamine support includes regular exercise (the strongest natural dopamine booster), adequate sleep, and tyrosine-rich foods. Avoid self-medicating with substances.
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