Magnesium Supplements — Essential Mineral for Body & Mind

Magnesium (Mg) is an essential macro-mineral that cannot be synthesised by the body and must come from food or supplements. It acts as a cofactor in over 300 enzymatic reactions, including:

• ATP synthesis — the primary energy currency of every cell
• DNA and RNA synthesis — essential for cell repair and growth
• Muscle contraction — works with calcium to regulate contraction and relaxation
• Nerve signal transmission — regulates ion channels and neurotransmitters
• Blood glucose regulation — helps cells respond to insulin

The body stores approximately 25 g of magnesium: 60% in bone, 20% in muscle, and the remainder in soft tissue and body fluids.

Magnesium provides several key health benefits:

• Muscle: supports normal muscle function, reduces cramps, spasms, and post-exercise fatigue. Acts as a calcium antagonist helping muscles naturally relax after contraction.
• Sleep: supports melatonin production and GABA neurotransmitter function, promoting relaxation. Supplementation may support sleep quality and reduce time to fall asleep.
• Stress: plays a role in regulating the HPA (Hypothalamic-Pituitary-Adrenal) axis involved in stress response. Those with high stress or mood fluctuations may benefit from supplementation.
• Bone: aids calcium absorption and activation of vitamin D (to its active form), essential for bone density.
• Energy: key component of the Krebs cycle and ATP production, helping reduce fatigue and support vitality.

The magnesium salt form affects absorption rate and target benefits:

• Magnesium Glycinate: bound to glycine (amino acid), highest bioavailability, minimal GI irritation. Best for: sleep, stress relief, muscle cramps, sensitive stomachs.
• Magnesium L-Threonate (Magtein): the only form shown to cross the Blood-Brain Barrier (BBB) effectively, developed at MIT. Best for: memory, focus, cognitive function support.
• Magnesium Citrate: bound to citric acid, good absorption, supports bowel motility. Best for: exercise, general health, those with constipation.
• Magnesium Oxide: highest elemental magnesium content (60%) but very low absorption (~4%). Often found in laxatives, not recommended as a primary magnesium supplement.
• Magnesium Malate: bound to malic acid, good absorption. Best for: energy, muscle health, fatigue management.

Groups at higher risk of deficiency or who may benefit from supplementation:

• Regular exercisers: physical activity increases magnesium loss through sweat — runners, athletes, and heavy trainers need more than average.
• High-stress individuals: stress increases urinary magnesium excretion, rapidly depleting body stores.
• Poor sleepers: Magnesium Glycinate supports relaxation and sleep quality.
• Frequent coffee or alcohol consumers: both have diuretic effects that increase magnesium loss.
• Older adults: absorption decreases with age alongside reduced dietary intake.
• Those with diabetes or insulin resistance: magnesium plays a role in insulin function and glucose metabolism.
• High processed food diets: processed foods are low in magnesium and contain absorption inhibitors.

Best natural food sources of magnesium:

• Pumpkin Seeds: ~150 mg/30 g — one of the richest sources
• Dark Chocolate (70%+): ~65 mg/30 g
• Almonds: ~80 mg/30 g
• Spinach: ~78 mg/half cup cooked
• Black Beans: ~60 mg/half cup
• Avocado: ~58 mg/1 fruit
• Banana: ~32 mg/1 medium
• Oats: ~57 mg/half cup
• Salmon: ~53 mg/90 g

Note: those who exercise regularly, experience high stress, or frequently consume coffee/alcohol may need additional magnesium beyond diet alone — supplementation can help fill that gap.

Choose the magnesium form based on your health goals:

• Goal: better sleep / stress relief → Magnesium Glycinate (Swisse or Blackmores Bio Magnesium) — high absorption, gentle on stomach, take before bed.
• Goal: brain and memory support → Magnesium L-Threonate / Magtein (Dr.PONG Magtein) — crosses BBB effectively, take in the morning.
• Goal: exercise performance / muscle / cramp reduction → Magnesium Complex + B (Vistra or Interpharma effervescent) — supports energy and recovery.
• Goal: general health / starting out → Magnesium Glycinate or Citrate at 150-200 mg/day.

General tips: take with food or before bed. Avoid taking with antibiotics or high-calcium foods as these may reduce absorption. Free pharmacist consultation available via Line @intimo.

Magnesium is safe at recommended doses but has precautions to be aware of:

• Common side effects: diarrhoea, nausea, or stomach cramps — especially with Oxide and high-dose Citrate. Reduce dose or switch to Glycinate form.
• Safe upper limit: Tolerable Upper Intake Level (UL) from supplements is 350 mg/day for adults.
• Kidney disease: kidneys regulate magnesium excretion — those with kidney disease should consult a doctor before supplementing.
• Drug interactions: fluoroquinolone and tetracycline antibiotics, diuretics, bisphosphonates (osteoporosis drugs) — space consumption by 2 hours.
• Pregnancy: RDA for pregnant women is 350-360 mg/day, generally safe, but consult a doctor before additional supplementation.

Magnesium works well with certain nutrients but should be spaced from others:

• Good combinations:
  • Vitamin D3: synergistic — vitamin D requires magnesium for conversion to its active form. Those supplementing D3 should also ensure adequate magnesium.
  • Vitamin B6: enhances magnesium uptake into cells. Products combining both work synergistically.
  • Zinc (low dose): safe to take together.
• Space by 2 hours:
  • Calcium: compete for absorption — take magnesium in the morning and calcium in the evening or at night.
  • Iron: may interfere with absorption at high doses.
  • Zinc (>40 mg): high-dose zinc reduces magnesium absorption.