Magnesium Deficiency UK: Signs, Symptoms and How to Fix It
Magnesium Deficiency UK: Signs, Symptoms and How to Fix It
Magnesium deficiency is one of the most prevalent — and most overlooked — nutritional problems in the UK. Surveys suggest that between 50–70% of British adults consume less magnesium than the recommended daily amount. The consequences affect energy, sleep, mood, cardiovascular health, and muscle function.
Why Magnesium Deficiency is So Common in the UK
Several factors have driven widespread magnesium insufficiency:
- Soil depletion: Modern intensive farming has significantly reduced the magnesium content of soil, meaning the food grown in it contains less magnesium than it did 50 years ago
- Processed food diets: Food processing strips magnesium — refined grains lose up to 80% of their magnesium content
- Common medications: Proton pump inhibitors (omeprazole, lansoprazole), diuretics, and some antibiotics reduce magnesium absorption
- Alcohol and caffeine: Both increase urinary magnesium excretion
- Stress: Cortisol (the stress hormone) accelerates magnesium depletion
Signs of Magnesium Deficiency
Sleep problems: Difficulty falling asleep, waking through the night, and not feeling rested are classic signs. Magnesium regulates GABA, the calming neurotransmitter that quietens the nervous system for sleep.
Muscle cramps and spasms: Particularly leg cramps at night. Magnesium regulates muscle contraction — without enough, muscles cannot relax properly.
Fatigue and weakness: Magnesium is required for ATP synthesis. Low magnesium means inefficient energy production.
Anxiety and low mood: Magnesium regulates the HPA (stress response) axis and supports serotonin production. Deficiency is associated with higher anxiety and lower mood.
Headaches and migraines: Magnesium deficiency is one of the most consistent findings in migraine sufferers. Several clinical trials support magnesium supplementation for migraine prevention.
Palpitations: Magnesium regulates heart rhythm. Palpitations or irregular heartbeat can be a sign of significant deficiency — see your GP.
How to Correct Magnesium Deficiency
Dietary sources: dark leafy greens (spinach, kale), nuts and seeds (pumpkin seeds are exceptionally rich), legumes, dark chocolate, and whole grains all contain meaningful amounts of magnesium.
For supplementation, the form matters enormously. Magnesium oxide — the cheapest and most common form — has only around 4% absorption. Magnesium glycinate is the gold standard: it's the most bioavailable oral form, gentle on digestion, and the glycine it's bound to has additional calming and sleep-supportive properties.
Our Magnesium Glycinate provides a 2-month supply. Take 2 capsules in the evening for sleep and recovery support.
Written by Dr Chun Tang, MBChB, MRCGP — founder of Little Ox and practising UK GP.