Functional Medicine Testing in London – What Can It Reveal?
By Tharb Faisl
You eat well, you try to rest, but something still doesn’t feel right.
Your standard blood tests may come back “normal”, but you don’t feel normal.
That’s where Functional Medicine Testing comes in.
Unlike conventional testing, which often just flags major illness, functional medicine explores how your body’s systems interact – and where things might be subtly breaking down. It’s not about diagnosing a disease – it’s about optimising your health and fixing problems before they escalate.
At Marylebone Diagnostic Centre, located in the heart of Baker Street, we help you get to the root of the problem – with advanced, personalised testing that leads to real answers and measurable results.
What Is Functional Medicine Testing?
Functional Medicine is a scientific approach that asks a simple but powerful question:
“Why is this happening in your body?”
Functional testing looks beyond traditional blood work to identify:
- Gut dysfunction
- Hormonal imbalance
- Nutritional deficiencies
- Detoxification issues
- Chronic inflammation
- Food sensitivities
- Stress hormone disruption
Whether you’re battling fatigue, skin flare-ups, brain fog, bloating, or low mood, functional testing can reveal what’s really going on beneath the surface — so you can stop guessing and start healing.
Book Your Functional Medicine Testing in London Today!
Functional Medicine vs. Standard Testing: A Clearer Picture
| Feature | Standard Test | Functional Test |
| Focus | Disease detection | Root cause discovery |
| Scope | Basic blood parameters | Comprehensive panels across multiple systems |
| Personalised? | No – generic panels | Yes – tailored to your symptoms |
| Report Detail | Basic | Full clinical interpretation |
| Use Case | React to illness | Prevent, optimise, personalise |
Book Your Functional Medicine Testing in London Today!
What Can We Test?
Here’s a closer look at the systems and conditions we can investigate through functional testing:
Gut & Digestive Health
If you’re constantly bloated, gassy, or have irregular bowel movements, your gut could be inflamed, imbalanced or even leaky. We test for:
Microbiome balance
Inflammation (calprotectin)
Parasites & pathogens
Intestinal permeability (zonulin)
Pancreatic enzyme levels
Gut-based immune markers (sIgA)
Book Your Functional Medicine Testing in London Today!
Nutrient Absorption & Deficiencies
You can eat the perfect diet and still be deficient if your body can’t absorb nutrients. We assess:
Vitamin B12, D, folate, magnesium, iron
Amino acid profiles
Essential fatty acids (omega 3/6)
Mineral balance (zinc, copper, selenium)
Energy & Mitochondrial Function
Feeling drained even after rest? These tests explore your body’s ability to produce and maintain energy:
Organic acid test
CoQ10 and NAD+ markers
Carnitine and mitochondrial resilience
Mood, Stress & Hormones
Functional testing can assess neurotransmitter precursors and adrenal performance:
Cortisol (saliva or blood)
DHEA, testosterone, oestradiol
Full female hormone cycle mapping
TSH, T3, T4, reverse T3
Adrenal fatigue indicators
Book Your Functional Medicine Testing in London Today!
Immune & Inflammatory Markers
Inflammation is the silent driver of ageing and chronic disease. We test for:
hsCRP, ESR, cytokines
ANA (autoimmune activity)
Immunoglobulin activity
Mast cell activation & histamine intolerance
Toxins & Detox Pathways
Struggling with headaches, skin rashes, or chemical sensitivities? You may have a detox bottleneck:
Heavy metal screening (mercury, lead, arsenic)
Liver detox capacity (phase I & II enzymes)
Oxidative stress biomarkers
Methylation pathway support
“I spent 18 months going back and forth with GPs, trying to explain my fatigue and digestive issues. Everything came back ‘normal’. Functional testing revealed I had a leaky gut, low magnesium, and high cortisol. A tailored plan finally gave me my life back.”
— Ellie, 29, Paddington
Why Central London Clients Choose Us
Located on Baker Street, within easy reach of Harley Street, Euston, Kings Cross, Mayfair, and Paddington, we offer:
Same-day appointments
No GP referral required
Discreet consultations
Testing handled by clinical experts
Full interpretation reports and review
Book Your Functional Medicine Testing in London Today!
FAQs – Functional Medicine Testing
Ready to Uncover the Root Cause?
No more “normal” bloods that explain nothing
Targeted testing across gut, hormones, energy & more
Fast appointments, expert support
Discreet, tailored, transformational
Book Functional Testing at Marylebone Diagnostic Centre