Vitamin Profile

The vitamin profile test measures the levels of calcium, folate, vitamin B12, total vitamin D, and thyroid-stimulating hormone (TSH) in your body.

Calcium is an important mineral that helps your nerves, muscles, and heart work properly. Folate (folic acid) is a type of vitamin B that helps the body make new cells. Vitamin B12 is important for making DNA (the genetic material in your body). Vitamin D helps the body absorb and retain calcium and phosphorus, which are important for strong bones. TSH affects your breathing, heart rate, weight, digestion, and mood. Therefore, doctors use this test to check for health problems associated with abnormal levels of these important vitamins, minerals, and hormone levels.

The test may be advised for individuals who are experiencing symptoms that suggest abnormal vitamin or mineral levels:

• Abnormal calcium levels: constipation, nausea, increased thirst, dry skin, muscle cramps, and irregular heartbeat.
• Folate deficiency: fatigue, poor growth, irritability, and diarrhoea.
• Abnormal vitamin D levels: bone pain, muscle weakness, weak bones, nausea, vomiting, and weight loss.
• Abnormal TSH levels: weight changes, trouble sleeping, fatigue, shaky hands, dry skin, heavy menstrual periods, depression, and constipation.

The vitamin test may be used with other tests to help detect or evaluate certain conditions such as:

• Hypercalcaemia – This is a condition in which the calcium level in your blood is higher than normal.
• Hypocalcaemia - This is a condition in which the calcium level in your blood is lower than normal.
• Folate deficiency – This is a condition caused by lower-than-normal amounts of folate in the body.
• Vitamin D deficiency – This means that you do not have sufficient vitamin D for normal functioning.
• Hypervitaminosis D – This is a condition caused by excess vitamin D levels, usually due to taking too much vitamin D.
• Pernicious anaemia – This is a condition in which the intestine cannot properly absorb vitamin B12, leading to a decrease in the number of red blood cells.
• Crohn’s disease – This is a long-term inflammatory condition that affects the digestive tract and reduces the absorption of vitamins and minerals.
• Coeliac disease – This is an autoimmune disorder that affects the lining of the small intestine due to eating gluten (present in most wheat-based products).

What to Expect Before the Vitamin Profile Test

No fasting is required for a standalone Vitamin Profile test. You can eat and drink normally. However, if it is part of a broader package that includes fasting tests, your doctor may advise fasting for 8-12 hours. Avoid strenuous exercise for 24 hours before the test, as intense physical activity can temporarily raise Vitamin Profile levels and affect interpretation. Always inform your doctor about any ongoing medications.

What to Expect During the Blood Collection

A phlebotomist cleans the skin with an antiseptic, then places an elastic band around your upper arm to make the veins easier to access. A small needle is inserted into the vein; you may feel a brief pinch. Blood is collected into a labelled tube in under a minute.

What to Expect After the Vitamin Profile Test

A small cotton swab and bandage are placed over the site to stop any minor bleeding. You can return to normal activities immediately. Minor bruising is normal and disappears quickly. If dizzy, sit and rest for a few minutes.

The vitamin profile test measures the levels of the following in a blood sample:

• Calcium
• Folate (folic acid)
• Vitamin B12
• Total vitamin D
• TSH

The vitamin profile test normal range is indicated in the table below.

Note: Normal values may vary depending on laboratory standards, age, and existing health conditions.

The test result interpretation is given in the table below.

The blood test for vitamin and mineral deficiencies is generally safe. However, possible risks and limitations include:

Risks:

The test is generally safe and involves minimal risk. You might feel slight pain when the needle is inserted or mild bruising afterwards, which usually resolves spontaneously.

Limitations:

• The test alone cannot be used to diagnose any conditions; additional tests are generally required.
• You might need to fast for a few hours before the blood test. Consult your doctor for further advice on this.

Depending on your symptoms and results, your doctor may recommend certain tests to better understand your condition:

• Free T4, (thyroxine) test
• Free T3, (triiodothyronine) test
• Triiodothyronine (T3) test
• Complete blood count (CBC)
• Serum methylmalonic acid test
• Serum phosphorus level