Vitamins and minerals
What is Vitamin A (Retinol)?
for vision, immunity, and skin
- Unit
- µmol/L
- Sample
- Serum
- Fasting
- 10 hours
- Turnaround
- 5 days
Vitamin A is needed for vision, immunity, and skin function. The value reflects storage and intake.
Deficiency is uncommon in Sweden but can occur with malabsorption or very restrictive diets. High intake from supplements can be harmful. The sample is taken fasting because blood fats after a meal can interfere with the assay.
What does low Vitamin A (Retinol) mean?
Low vitamin A can produce poor night vision, skin problems, and impaired immunity.
What does high Vitamin A (Retinol) mean?
High vitamin A almost always reflects excess supplementation and can be liver-toxic.
More markers in the same area
Launching in Stockholm in 2026.
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This is general information about the marker, not an assessment of your values and not medical advice. Last updated: August 2026.