Macroprolactin Blood Test, from our experts to you.
Dr Sam Rodgers MBBS, MRCGP

Chief Medical Officer meet our doctors

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What is a
Macroprolactin Blood Test?

Our Macroprolactin Blood Test measures both prolactin and macroprolactin levels in your blood and does not distinguish between them.

What is

Macroprolactin is a biologically inactive form of prolactin found in a small proportion of people. It is bound to IgG antibodies.

Why take a
macroprolactin blood test?

Our test can help to investigate elevated levels of prolactin in your blood. With this test, you can see if elevated prolactin levels are caused by high macroprolactin (which would have no impact on fertility, milk production, or the menstrual cycle). Macroproprolactin is estimated to be responsible for around 15% of all elevated prolactin cases.

What's included?

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Macroprolactin A macroprolactin test may be advised by one of our doctors to help understand whether a high prolactin reading is significant.
Prolactin Prolactin is a hormone which is produced in the pituitary gland and plays a role in reproductive health. Its primary purpose is to stimulate milk production after childbirth, and in pregnant and breastfeeding women prolactin levels can soar.
PEG : Native
Monomeric Prolactin Post PEG

How to prepare
for your test

Special instructions

Prepare for your Macroprolactin Blood Test by following these instructions. Please take your sample before 10am. Do not take biotin supplements for two days before this test, discuss this with your doctor if it is prescribed.

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