Vitamin A

fS-A-vit KL 1113

Vitamin A is a type of fat-soluble vitamin essential for various bodily functions, including supporting vision, cell growth, and differentiation, as well as playing a role in reproduction. It also aids in maintaining normal iron metabolism and contributes to the health of mucous membranes, skin, and vision, while supporting the proper functioning of the immune system. Decreased levels of vitamin A may suggest insufficient intake or difficulty absorbing fats, while elevated levels may indicate excessive use of vitamin supplements. Notably, children and young individuals (under 19) typically have lower vitamin A levels compared to adults.


Indicating either a deficiency or an excessive intake of vitamin A.


For a blood sample, fasting for 12 hours is necessary. You can have a glass of water and take your regular medication, but no vitamin A supplements during this 12-hour period.


1 mL of serum (minimum 0.5 mL), 12 hours fasting. Protect from direct sunlight.

Storage and delivery

Delivery at room temperature on the sampling day. Store refrigerated over the weekend, ship at room temperature.


Liquid chromatography (HPLC)

Reference ranges

women 1.1 – 3.1 µmol/L
​men 1.4 – 3.7 µmol/L

Testing frequency

Once per week

Turnaround time

(weekdays) 5 – 10


The same sample may be used to test for vitamin E, KL 3169.


Last update 8.8.2023