Selenium-dependent antioxidant enzyme.
| Genotype | Impact | What it means |
|---|---|---|
| CC (Normal) | Normal | Normal GPX1 activity - good selenium-dependent antioxidant defence. Maintain adequate selenium (1-2 Brazil nuts/day). |
| CT (Carrier) | Low impact | Reduced GPX1 activity - modestly weaker antioxidant protection. Ensure optimal selenium (Brazil nuts, fish, eggs) and antioxidant-rich foods. |
| TT (Variant) | Moderate | Significantly reduced GPX1 activity - higher oxidative stress. Prioritise selenium, zinc and colourful antioxidants; avoid smoking and excess alcohol. |
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