Product Features:
Adults who show signs of deficiency, such as night blindness, dry skin, or poor wound healing. It may also be used to assess the nutritional status of individuals with malabsorption disorders, liver disease, or those on restrictive diets.
The box contains Test4A Cassette, buffer vial, transfer pipette, lancet, and instructions
Instructions Details
Test4A is a rapid, point-of-care test that provides a quantitative measure of Vitamin A (retinol) levels in blood, using NanoSpeed’s “cube reader” technology
Vitamin A is essential for vision, immune function, skin health, and cellular growth. Deficiency can cause symptoms like night blindness, dry skin, poor wound healing, or increased susceptibility to infections. The test helps assess vitamin A nutritional status.
It is intended for adults who show symptoms or have risk factors for vitamin A deficiency (e.g. night blindness, skin issues, malabsorption disorders, restrictive diets, liver disease).
Collect a small drop of blood (finger-prick) using the lancet. Transfer the blood onto the test cassette using the pipette. Add the buffer as instructed. Insert the cassette into the cube reader. The device displays the vitamin A concentration (in µmol/L) within about 10 minutes.
The test can quantitatively measure Vitamin A in the range 0.25 to 4.0 µmol/L.
You get the result in approximately 10 minutes from applying the blood sample.
While NanoSpeed doesn’t explicitly list sensitivity or specificity on the page, the quantitative format, calibrated reader, and narrow detection range aim for precise results. However, like any diagnostic test, accuracy can depend on sample handling, timing, user error, and biological variation.
Values below or above the detection range (0.25–4.0 µmol/L) may not be reliably quantified. Vitamin A levels can fluctuate with recent diet, fat absorption, liver function, or infection. As a rapid POC (point-of-care) test, it may not substitute fully for lab assays in complex medical cases.Improper sampling (insufficient or excessive blood volume, incorrect buffer mixing, timing errors) may lead to inaccurate results.
“Normal” retinol levels depend on population, age, sex, and local lab standards, but often lie within the detection range. Values below ~0.7 µmol/L are associated with deficiency in many settings. (You should compare with reference ranges used by clinical labs or public health guidelines.)
Low vitamin A suggests deficiency, which may stem from poor dietary intake, malabsorption (e.g. intestinal disorders), fat digestion issues, liver disease, or increased demand (e.g. in illness). Clinical evaluation and broader nutritional assessment will be needed.
Excessively high vitamin A levels may indicate over-supplementation, hypervitaminosis A, or disturbances in metabolism or liver storage. High levels might be harmful, so clinical correlation is essential.
Yes — we ship Quantitative Vitamin A Test kit internationally, including to India, Germany, and the UK. However, shipping availability, customs clearance, and local regulatory requirements may vary by country.
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