Hidden Vitamin Deficiencies in Busy London Professionals: The Symptoms You Should Not Ignore
Reviewed by Dr Lauren Holland • Marylebone Diagnostic Centre
Results within 24 – 42 hours. Westminster residents receive 20% off.
Long working hours, limited daylight, irregular meals, stress and poor sleep make vitamin and mineral deficiencies increasingly common among London professionals. These deficiencies can cause tiredness, low mood, hair loss, muscle pain, poor concentration and weakened immunity. Many patients only discover the problem after months of symptoms.
At Marylebone Diagnostic Centre (MDC) we test hundreds of patients every year who believe they are experiencing burnout, when the real cause is a correctable deficiency such as low vitamin D, B12, folate, magnesium or iron.
This guide explains the hidden signs of deficiency, the most common nutrient gaps in London, and the blood tests that can provide clarity within 24–42 hours.
Why Deficiencies Are Increasing in London
Several factors make London one of the highest-risk cities for vitamin and mineral imbalance.
These lifestyle pressures combine to create silent deficiencies that cause symptoms often mistaken for stress or ageing.
The Most Common Hidden Deficiencies in London Professionals
The following deficiencies appear most frequently in our clinic.
Vitamin D Deficiency
Vitamin D deficiency is widespread in London, affecting people of all ages. Low levels cause tiredness, bone pain, muscle aches, low immunity and low mood. Levels are typically lowest between November and March.
Symptoms include
- Low energy
- Muscle weakness
- Bone or back pain
- Increased infections
- Sleep disruption
- Low mood
Recommended testing at MDC
- Vitamin D (25-OH) blood test
- Included in several wellness and fatigue profiles
Vitamin B12 and Folate Deficiency
B12 and folate are essential for energy production, nerve function and red blood cell formation. Low levels can cause severe fatigue, memory problems and numbness.
Symptoms include
- Tiredness
- Brain fog
- Pins and needles
- Fast heartbeat
- Pale skin
- Digestive discomfort
Those most at risk include vegans, vegetarians, people on restricted diets, patients with IBS, and adults over 50.
Recommended testing at MDC
- Vitamin B12
- Folate
- Full Blood Count
- Homocysteine if clinically indicated
Iron Deficiency
Iron deficiency is one of the most common causes of low energy in young women and active professionals. It can develop slowly and be missed for months.
Symptoms include
- Shortness of breath
- Cold hands and feet
- Hair thinning
- Dizziness
- Low stamina
- Rapid heart rate
Irregular or heavy periods are a common cause in women.
Recommended testing at MDC
- Ferritin
- Iron studies
- Full Blood Count
Magnesium Deficiency
Magnesium supports muscle function, sleep quality and energy production. Low levels contribute to fatigue, muscle cramps, headaches and anxiety.
Symptoms include
- Muscle twitches
- Restless sleep
- Migraines
- Weakness
- Anxiety
- Palpitations
Recommended testing at MDC
- Magnesium blood test
- Hair Mineral Analysis for longer-term mineral patterns
Zinc Deficiency
Zinc supports immunity, skin healing, reproductive health and taste and smell. Low levels may cause hair loss, frequent infections and slow wound healing.
Symptoms include
- White spots on nails
- Hair thinning
- Low immunity
- Reduced appetite
Recommended testing at MDC
- Zinc
- Hair Mineral Analysis
How Deficiencies Affect Work Performance
Many London workers struggle with symptoms that impact daily productivity.
- Difficulty concentrating
- Reduced short-term memory
- Low energy in the afternoon
- Slow recovery after illness
- Increased susceptibility to colds
- Reduced exercise performance
Blood tests help determine whether the cause is lifestyle, nutrient imbalance, medical conditions or stress.
The Blood Tests Recommended for Busy Professionals
MDC provides targeted testing that identifies root causes quickly.
Recommended individual tests
- Vitamin D
- Vitamin B12
- Folate
- Ferritin and Full Iron Profile
- Magnesium
- Zinc
- Thyroid Profile
- Full Blood Count
- HbA1c
Recommended profiles at MDC
- Fatigue and Energy Profile
- Advanced Wellness Profile
- Hair Mineral Analysis (long-term mineral review)
These tests help determine whether symptoms are related to deficiency or another health condition.
When You Should Test
You should arrange a test if you notice any of the following for more than two weeks.
- Tiredness
- Brain fog
- Unexplained hair loss
- Muscle pain or soreness
- Low mood
- Sleep disturbance
- Irregular heartbeat
- Cold hands and feet
- Poor immunity
- Difficulty waking up
- Pins and needles
Many patients feel better within weeks once the correct deficiency is treated.
Why Deficiencies Should Not Be Ignored
Untreated deficiencies can lead to long-term complications.
Testing allows early detection and targeted treatment.
Why Choose Marylebone Diagnostic Centre
- Fast results within 24 – 42 hours
- Comprehensive nutrient and wellness profiles
- Hair Mineral Analysis for long-term trends
- Discreet appointments
- Clear explanation of results
- QC-validated laboratory accuracy
- Open Monday to Saturday
- 5-minute walk from Baker Street Station
Westminster residents receive 20% off
Book Your Vitamin and Wellness Blood Test
Marylebone Diagnostic Centre
73 Baker Street, London W1U 6RD
Tel: +44 7495 970109
Monday to Saturday, 08:00–16:00
Fast, discreet and accurate testing for busy professionals.
Quick Links
- Vitamin D Blood Test
- Vitamin B12 Test
- Iron and Ferritin Profile
- Thyroid Profiles
- Full Blood Count
- HbA1c Test
- Fatigue and Energy Profile
- Advanced Wellness Profile
- Hair Mineral Analysis
