{"id":10101,"date":"2025-07-25T00:08:33","date_gmt":"2025-07-24T21:08:33","guid":{"rendered":"https:\/\/medilab.km.ua\/?p=10101"},"modified":"2026-04-20T18:53:38","modified_gmt":"2026-04-20T15:53:38","slug":"vitamin-a-in-the-blood-how-do-you-know-what-is-not-present-in-the-body","status":"publish","type":"post","link":"https:\/\/medilab.km.ua\/en\/vitamin-a-in-the-blood-how-do-you-know-what-is-not-present-in-the-body\/","title":{"rendered":"Vitamin A in the blood: how to find out what the body lacks"},"content":{"rendered":"
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Fatigue, dry skin, poor vision at dusk\u2026<\/strong> Often, these symptoms are associated with general exhaustion or fatigue, although the cause may lie in a banal but dangerous deficiency of vitamin A. This is one of the main fat-soluble vitamins responsible for vision, skin, mucous membranes, immunity, and even the proper functioning of genes.<\/p>\n

Timely determination of vitamin A in the blood helps prevent serious consequences and adjust nutrition or therapy. In this article, we will take a detailed look at why you should take a vitamin A test, how to prepare, who needs it, what the consequences of deficiency and excess can be, and how to interpret the results.<\/p>\n

What is vitamin A and why is it important?<\/h2>\n

Vitamin A (retinol) is a group of biologically active compounds, the most famous of which are retinol, retinal, and retinoic acid. It enters the body either in the form of ready-made retinol from animal products or as a provitamin - beta-carotene from plant foods.<\/p>\n

Functions of vitamin A:<\/p>\n

    \n
  • \n

    Provides clear vision in the dark<\/p>\n<\/li>\n

  • \n

    Participates in the formation of epithelial tissues<\/p>\n<\/li>\n

  • \n

    Stimulates the regeneration of skin and mucous membranes<\/p>\n<\/li>\n

  • \n

    Regulates gene expression<\/p>\n<\/li>\n

  • \n

    Supports immune response<\/p>\n<\/li>\n<\/ul>\n

    Who is recommended to check vitamin A levels?<\/h2>\n

    The analysis is most often prescribed in the following cases:<\/p>\n

      \n
    • \n

      Frequent infectious diseases (ARVI, otitis, conjunctivitis)<\/p>\n<\/li>\n

    • \n

      Impaired vision at dusk (so-called "night blindness")<\/p>\n<\/li>\n

    • \n

      Peeling and dry skin<\/p>\n<\/li>\n

    • \n

      Chronic gastrointestinal diseases (celiac disease, Crohn's disease)<\/p>\n<\/li>\n

    • \n

      Growth retardation in children<\/p>\n<\/li>\n

    • \n

      Suspected hypervitaminosis A (especially when taking supplements)<\/p>\n<\/li>\n

    • \n

      Presence of hepatobiliary diseases<\/p>\n<\/li>\n<\/ul>\n

      How to prepare for the analysis<\/h2>\n

      Preparing for a vitamin A test requires following a few simple conditions:<\/p>\n

        \n
      • \n

        Fasting: blood is taken in the morning, 8\u201312 hours after the last meal<\/p>\n<\/li>\n

      • \n

        Eliminate fatty foods for 24 hours<\/p>\n<\/li>\n

      • \n

        Do not take vitamin complexes for at least 2\u20133 days before the test.<\/p>\n<\/li>\n

      • \n

        Avoid alcohol the day before<\/p>\n<\/li>\n<\/ul>\n

        Research methodology<\/h2>\n

        Most laboratories use high-performance liquid chromatography (HPLC) to measure vitamin A levels in serum. This is a highly accurate method that allows for accurate measurement of retinol concentrations.<\/p>\n

        Normal levels of vitamin A in the blood<\/h2>\n
        \n
        \n\n\n\n\n\n\n\n
        Parameter<\/th>\nNorm (mcg\/dL)<\/th>\nNorm (\u03bcmol\/L)<\/th>\n<\/tr>\n<\/thead>\n
        Vitamin A (retinol)<\/td>\n20\u201350<\/td>\n0.7\u20131.75<\/td>\n<\/tr>\n
        Critical shortage<\/td>\n<10<\/td>\n<0.35<\/td>\n<\/tr>\n
        Potential toxicity<\/td>\n>100<\/td>\n>3.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        \n
        <\/div>\n<\/div>\n<\/div>\n<\/div>\n

        It is worth considering that the norms may vary slightly in children, the elderly, pregnant women, and people with chronic diseases.<\/p>\n

        Signs of vitamin A deficiency<\/h2>\n
          \n
        • \n

          Decreased vision at dusk<\/p>\n<\/li>\n

        • \n

          Peeling and dry skin<\/p>\n<\/li>\n

        • \n

          Frequent respiratory infections<\/p>\n<\/li>\n

        • \n

          Dry eyes, xerophthalmia<\/p>\n<\/li>\n

        • \n

          In children, growth and development delay<\/p>\n<\/li>\n

        • \n

          In women, fertility disorders<\/p>\n<\/li>\n<\/ul>\n

          What is the danger of excess vitamin A?<\/h2>\n

          Excessive consumption of retinol, especially through supplements, can cause:<\/p>\n

            \n
          • \n

            Headache, nausea, dizziness<\/p>\n<\/li>\n

          • \n

            Skin peeling, hair loss<\/p>\n<\/li>\n

          • \n

            Bone and joint pain<\/p>\n<\/li>\n

          • \n

            Liver enlargement<\/p>\n<\/li>\n

          • \n

            In pregnant women - teratogenic effect (risk to the fetus)<\/p>\n<\/li>\n<\/ul>\n

            \"woman<\/p>\n

            What diseases can affect vitamin A levels?<\/h2>\n

            Decreased vitamin A concentrations can cause:<\/p>\n

              \n
            • \n

              Chronic diarrhea<\/p>\n<\/li>\n

            • \n

              Fat malabsorption<\/p>\n<\/li>\n

            • \n

              Hepatitis and cirrhosis<\/p>\n<\/li>\n

            • \n

              Pancreatitis<\/p>\n<\/li>\n

            • \n

              Kidney failure<\/p>\n<\/li>\n<\/ul>\n

              What to do if deviations are detected<\/h2>\n

              After the analysis, the doctor may recommend:<\/p>\n

                \n
              • \n

                Dietary correction (cod liver, butter, carrots, spinach)<\/p>\n<\/li>\n

              • \n

                Taking vitamin supplements (only on the recommendation of a doctor!)<\/p>\n<\/li>\n

              • \n

                Repeat analysis after 1\u20133 months<\/p>\n<\/li>\n<\/ul>\n

                Where can I take the test?<\/h2>\n

                At Medilab Plus, we offer high-quality laboratory testing of vitamin A levels using modern equipment. The test is performed quickly, with results the next day. We provide consultations on the preparation and interpretation of results.<\/p>\n

                Recommended tests block<\/h3>\n
                \n
                \n\n\n\n\n\n\n\n\n
                Analysis name<\/th>\nGoal<\/th>\nEstimated cost<\/th>\n<\/tr>\n<\/thead>\n
                Vitamin A analysis<\/td>\nDefinition retinol level<\/a><\/td>\nfrom 550 UAH<\/td>\n<\/tr>\n
                Vitamin D analysis<\/a><\/td>\nFor a comprehensive assessment of bone condition and immunity<\/td>\nfrom 600 UAH<\/td>\n<\/tr>\n
                Biochemical blood test<\/td>\nAssessment of liver function, proteins, enzymes<\/td>\nfrom 370 UAH<\/td>\n<\/tr>\n
                Complex "Fat-soluble vitamins"\u00ab<\/td>\nA, D, E, K \u2014 general assessment of vitamin status<\/td>\nfrom 1200 UAH<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
                \n
                <\/div>\n
                Monitoring your vitamin A levels is an investment in your health. If you experience frequent colds, decreased vision at night, or notice dry skin, don't delay. A simple test will help you identify the problem in time and avoid complex consequences that, at first glance, are completely unrelated to the vitamin.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n
                <\/div>","protected":false},"excerpt":{"rendered":"

                Fatigue, dry skin, poor vision at night... These symptoms are often associated with general exhaustion or overwork, although the cause may lie<\/p>","protected":false},"author":627,"featured_media":10102,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-10101","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"\n\u0410\u043d\u0430\u043b\u0456\u0437 \u043a\u0440\u043e\u0432\u0456 \u043d\u0430 \u0432\u0456\u0442\u0430\u043c\u0456\u043d A \u2013 \u0441\u0438\u043c\u043f\u0442\u043e\u043c\u0438, \u043f\u0456\u0434\u0433\u043e\u0442\u043e\u0432\u043a\u0430, \u043d\u043e\u0440\u043c\u0438<\/title>\n<meta name=\"description\" content=\"\u042f\u043a \u0434\u0456\u0437\u043d\u0430\u0442\u0438\u0441\u044f, \u0447\u0438 \u0432\u0438\u0441\u0442\u0430\u0447\u0430\u0454 \u0432\u0456\u0442\u0430\u043c\u0456\u043d\u0443 A? \u0427\u043e\u043c\u0443 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