FAQs Archive - Page 17 of 33

Q: Do I need to fast before a kidney function test?

No. You do not need to fast before a kidney function blood test. You can eat and drink normally before your appointment.

Q: What is a normal eGFR level?

A normal eGFR is 90 or above. Values between 60 and 89 may be normal depending on age and other factors, but an eGFR below 60 for three months or more can indicate chronic kidney disease. Your healthcare provider will interpret your eGFR in the context of your overall health.

Q: Can I share my results with another doctor or specialist?

Yes. Your results are yours to share with any healthcare professional - your GP, a trichologist, a dermatologist, or any specialist you choose.

Q: Do I need to fast before the test?

For most patients, fasting is not required. Our team will confirm any preparation instructions specific to your test when you book.

Q: How soon will I get my results?

Results are usually available within a few working days of your appointment. You will receive a clear written report with explanations for each marker.

Q: Is this test suitable for men?

Yes. While hormonal hair loss is often discussed in the context of women, the same markers — testosterone, SHBG, thyroid function, ferritin, and inflammation — are equally relevant for men experiencing thinning or shedding.

Q: What causes sudden hair loss?

Sudden or increased hair shedding is often caused by a condition called telogen effluvium, where hair follicles prematurely enter a resting phase. Common triggers include iron deficiency, thyroid dysfunction, hormonal changes (such as after pregnancy or during menopause), significant stress, or illness. A blood test can help identify whether an internal cause is contributing.

Q: Does the NHS test for hair loss causes?

A GP may arrange some blood tests if you present with hair loss, but NHS testing is typically limited to ruling out serious illness. Markers like ferritin are often interpreted using wide reference ranges that may miss the lower levels associated with hair loss. A private test allows a more focused assessment.