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Enzyme that converts beta-carotene to vitamin A
Essential for vitamin A production from plant sources
| Genotype | Impact | What it means |
|---|---|---|
| GG (Normal) | Normal | Efficient beta-carotene conversion |
| GT (Carrier) | Low impact | A379V heterozygote, beta-carotene to retinol conversion reduced by about 50%. Include preformed vitamin A sources : eggs (yolk), liver, dairy, fatty fish. Plant carotenoids remain useful but insufficient on their own. |
| TT (Variant) | Moderate | Significantly reduced beta-carotene to retinol conversion (~50%). Plant carotenoids alone are insufficient, include preformed vitamin A sources: egg yolks, liver, fatty fish, full-fat dairy. |
Reduces beta-carotene to vitamin A conversion efficiency.
| Genotype | Impact | What it means |
|---|---|---|
| CC (Normal) | Normal | Efficient beta-carotene to vitamin A conversion. |
| CT (Carrier) | Low impact | Moderate beta-carotene conversion. Include both plant and animal vitamin A sources. |
| TT (Variant) | Moderate | Poor beta-carotene conversion. Preformed vitamin A sources (eggs, liver, dairy) recommended. |
| Genotype | Impact | What it means |
|---|---|---|
| AA (Normal) | Normal | Efficient beta-carotene to vitamin A conversion. |
| AT (Carrier) | Low impact | Moderate beta-carotene conversion. Include both plant and animal vitamin A sources. |
| TT (Variant) | Moderate | Poor beta-carotene conversion. Preformed vitamin A sources (eggs, liver, dairy) recommended. |
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