Bone specific alkaline phosphatase

This is an important to help diagnose abnormal bone remodelling.

Venous blood
1 tests included
5 days turnaround



About Bone specific alkaline phosphatase

What is bone-specific alkaline phosphatase?

Bone-specific alkaline phosphatase (BAP) is an enzyme produced by bone cells responsible for bone formation. 

Bones are constantly changing over our lifetime in response to exercise, nutrition and hormones. Every 10 years the entire skeleton is replaced by a natural process called bone remodelling. Bone remodelling removes old bone and replaces it with new bone. Bone density typically increases during adolescence when bone formation is higher than bone loss. However, as we age, bone density starts to decline as bone resorption exceeds bone formation. As people age, lower bone density can lead to osteoporosis putting us at a greater risk of fractures.

BAP is a useful marker of bone turnover and high levels might indicate bone-related disorders such as Paget’s disease. Paget’s disease occurs as a result of disruption to the bone remodelling process causing bone to be produced too quickly. Bones will be weaker leading to an increased risk of fractures. 

Why take this test?

This test measures the level of BAP in the blood and can be used to help diagnose abnormal bone remodelling which occurs in conditions such as Paget’s disease and osteoporosis.

What's tested


How it works



Purchase your Kit

Just order a test online and get your kit delivered right to your door unless you are ordering a COVID-19 Fit to Fly test where you will be given appointment options to attend our clinics across the United Kingdom for a nose and throat swab PCR test at the checkout stage.



Take your test and post

Follow our simple instructions to take your sample and post back the enclosed prepaid envelope to our accredited lab for processing. We also offer home or workplace visits by a qualified nurse. For COVID-19 Fit to Fly tests you must attend one of our partner clinics for our trained collection officers to take your sample. You will then have the results emailed to you.



Get results directly to your dashboard

You will receive an email notification from our medical team when your results are available on your secure personalised health dashboard.