Vitamin A Serum Retinol
A vitamin your eyes, skin and immune defences all need.
Also printed asVitamin A (Retinol) · Retinol
What it measures
A fat-soluble vitamin from liver, eggs, dairy and orange vegetables.
Runs night vision, skin renewal and the immune lining of the gut and airway; too much strains the liver.
Why it matters for how long you stay well
It is stored in the liver rather than passed out daily, so unlike the B vitamins it can build up to harmful levels, which makes this a number to correct carefully rather than enthusiastically.
How it shows up in daily life
Running low shows first as trouble seeing in dim light, then as dry eyes and dry, rough skin.
High and low readings
When it reads high
Too much strains the liver; almost always from supplements.
When it reads low
Low intake of colourful vegetables and animal foods.
What moves it
Daily life
- carrots, pumpkin, mango, papaya and green leafy vegetables
- eggs, dairy and liver
- eating some fat with them, since it needs fat to be absorbed
- how well your gut absorbs fat
Common questions
What does Serum Retinol measure?
A fat-soluble vitamin from liver, eggs, dairy and orange vegetables. Runs night vision, skin renewal and the immune lining of the gut and airway; too much strains the liver.
What does a high Vitamin A result usually mean?
Too much strains the liver; almost always from supplements.
What does a low Vitamin A result usually mean?
Low intake of colourful vegetables and animal foods.
What is the usual reference range for Vitamin A?
A broad adult reference band is 30–80 µg/dL. Labs differ, so read your result against the band printed on your own report.
Educational only, not a diagnosis. A single number means little without your history and the rest of your panel, so discuss your own results with your physician.
Typical adult reference band
- Adults
- 30–80 µg/dL
Labs differ. The band printed on your own report is the one that applies to your result.
Reported in µg/dL
Ageing relevance
2/5
Relevant to the ageing of one organ, or to disease screening.
Worth knowing
It is stored in your liver, so unlike the B vitamins it can build up to levels that cause harm.
Have a report with this marker on it? Read it in context.
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