Why Would a Doctor Order a Prolactin Blood Test?


The medical field is continually advancing, and as patients, it’s crucial for us to understand why certain tests are recommended. One such test, a prolactin blood test, is often overlooked despite its importance in diagnosing various conditions, including hormonal imbalances and tumors. This article also sheds light on the stages of iron deficiency, as it is essential to understand how deficiencies can impact our health.

Stages of Iron Deficiency

Iron deficiency anemia can occur in a sequence of three stages, each with escalating consequences.

  1. First Stage: Iron stores are low but have yet to affect the production of red blood cells.
  2. Second Stage: Low iron stores lead to altered red blood cell production, producing iron-deficient erythropoiesis or latent iron deficiency.
  3. Third Stage: Iron deficiency anemia manifests when there is a lack of iron to produce hemoglobin, leading to decreased hemoglobin concentration. Symptoms such as fatigue, weakness, dizziness, and more may appear at this stage.

What happens to your body when you have very low iron?

Iron deficiency anemia can go unnoticed during its early stages. As iron reserves deplete, it can affect red blood cell production and lead to symptoms like fatigue, dizziness, and rapid heartbeat. The body’s cells become deprived of oxygen, impacting overall well-being.

Symptoms of Low Iron Levels

  • Pale skin
  • Fatigue
  • Weakness
  • Dizziness
  • Shortness of breath
  • Rapid heartbeat

TIBC in Iron Deficiency

Total Iron Binding Capacity (TIBC) is an indicator used to gauge iron levels in the body. A high TIBC typically signifies iron deficiency anemia. On the contrary, low TIBC could indicate conditions like hemolytic anemia, hypoproteinemia, inflammation, or liver diseases.

What is Prolactin and Why Test For It?

Prolactin is a hormone the pituitary gland produces that is essential for various bodily functions, including milk production and fertility. An imbalance in prolactin levels could indicate an underlying issue needing medical attention.

When Should Prolactin Levels Be Checked?

A prolactin blood test is commonly ordered when diagnosing conditions like infertility or to check for pituitary gland function. It might also be ordered if you experience symptoms like irregular menstrual cycles or unexpected milk production.

What Illness Causes High Prolactin Levels?

High prolactin levels, also known as hyperprolactinemia, can be caused by various factors, such as pituitary tumors, hypothyroidism, liver disease, or certain medications.

Symptoms of High Prolactin

  • Irregular menstrual cycles in women
  • Infertility
  • Unexplained milk production
  • Reduced libido
  • Erectile dysfunction in men

Is High Prolactin Something to Worry About?

High prolactin levels are not necessarily a cause for immediate concern but do require further investigation to rule out any severe conditions, such as tumors or hormone imbalances.

Common Cause of High Prolactin Levels

The most common cause of elevated prolactin levels is a benign pituitary tumor, also known as a prolactinoma. However, other factors like stress, certain medications, and physiological conditions like pregnancy can also cause elevated levels.

Is High Prolactin Cancerous?

High prolactin levels are often due to benign tumors and are usually not cancerous. However, it’s essential to undergo further testing to rule out the possibility of malignancy.

Normal Serum Prolactin Levels

Normal prolactin levels typically range between 2 and 29 ng/mL for women who are not pregnant and between 2 and 18 ng/mL for men, although these values can vary between laboratories.

What Happens if Serum Prolactin is High?

Elevated prolactin levels could lead to various symptoms, from infertility and sexual dysfunction to bone loss if left untreated for extended periods.

Additional Nutritional Considerations

Does Vitamin B12 Increase Iron Levels?

While Vitamin B12 does not increase iron levels, a deficiency can cause anemia, requiring both vitamins to be balanced.

What Vitamin is Best for Iron Deficiency?

Taking iron supplements in conjunction with Vitamin C can improve the absorption rate, making it an effective treatment for iron-deficiency anemia.

Can I Order a Prolactin Serum Test Online?

Yes! You can pick up and order your Prolactin Serum Test at Walk-In Lab. 


Understanding why a prolactin blood test or iron level test is essential can guide better healthcare decisions. While elevated or diminished levels of these substances may not indicate immediate life-threatening conditions, they serve as red flags for underlying issues requiring further investigation and management.  


Note: Always consult a healthcare professional for medical advice.