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Converts hydrogen peroxide to water.
| Genotype | Impact | What it means |
|---|---|---|
| CC (Normal) | Normal | Standard catalase activity - efficient breakdown of hydrogen peroxide. Maintain a colourful, antioxidant-rich diet. |
| CT (Carrier) | Low impact | Slightly lower catalase activity - modestly reduced antioxidant defence. Increase antioxidant foods (berries, dark leafy greens, green tea) and ensure adequate selenium and zinc. |
| TT (Variant) | Moderate | Lower catalase activity - weaker handling of oxidative stress. Prioritise antioxidant-dense foods, omega-3s and selenium (Brazil nuts); avoid smoking and limit excess alcohol. |
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