
What Are Hormones? Hormone Test in London
Hormones are chemical messengers that travel through your bloodstream, telling organs and tissues what to do. They control your metabolism, reproductive system, mood, energy levels, and even your skin and hair.
They may be tiny molecules, but their impact is enormous. Even a small imbalance can lead to symptoms like:
- Constant fatigue
- Unexplained weight gain or loss
- Mood swings or anxiety
- Irregular periods or fertility issues
- Skin breakouts or hair thinning
Your body produces over 50 different hormones, but the most commonly tested ones include:
- Oestrogen & Progesterone (female hormones)
- Testosterone (present in both men and women)
- Thyroid hormones (TSH, Free T4, Free T3)
- FSH & LH (related to fertility)
- Cortisol (stress hormone)
- Insulin (blood sugar regulation)
- Vitamin D (a hormone-like vitamin)
Book Your Hormones Test in London Today!
Why Hormonal Balance Matters
When your hormones are in balance, you feel energised, focused, and in control of your body. But when they’re not?
Symptoms can creep in subtly or hit you like a train.
Hormonal imbalances can lead to:
- PCOS in women
- Thyroid dysfunction (overactive or underactive)
- Chronic fatigue or burnout
- Mood disorders, including PMS and anxiety
- Sexual dysfunction or fertility problems
- Weight changes and sleep disturbances
What Causes Hormonal Imbalance?
Several factors may disrupt your body’s hormone production, including:
- Chronic stress
- Poor diet or vitamin deficiencies (e.g. low B12 or Vitamin D)
- Overuse of stimulants or alcohol
- Polycystic ovary syndrome (PCOS)
- Menopause or perimenopause
- Thyroid conditions
- Insulin resistance or diabetes
- Sleep deprivation
Even something as common as skipping meals or over-exercising can throw off your hormonal rhythm.
How Do You Test Your Hormones?
At Marylebone Diagnostic Centre, we offer comprehensive private hormone blood tests, including:
- Well Woman Profile – for complete female hormone insight
- Thyroid Function Test – including TSH and Free T4
- Vitamin Profile – for Vitamin D, B12 and Folate
- Oestradiol, FSH, LH – for fertility and menstrual cycle issues
- Testosterone Testing – for men and women experiencing fatigue or libido issues
Testing is available from our Baker Street clinic, easily accessible from:
- Harley Street
- Mayfair
- Kings Cross
- Euston
- Paddington
No GP referral is required, and we offer same-day appointments with rapid results.

Real People, Real Stories
“I always blamed stress for my tiredness, but my test showed low oestradiol and B12. Within a week of treatment, I felt like myself again.”
— Charlotte, 36, Marylebone
“I was struggling with low energy and couldn’t lose weight. Turns out, my thyroid was underactive. I’m grateful I checked early.”
— Imran, 42, Paddington
Frequently Asked Questions
Book Your Hormone Blood Test in Central London
Same-day appointments
No GP referral needed
Female health experts available
Calm, discreet clinic on Baker Street
Book Now at Marylebone Diagnostic Centre