Magnesium is one of the most essential minerals in the human body — involved in over 300 enzymatic reactions — yet it's estimated that a significant portion of the population doesn't get enough of it. From muscle function and sleep quality to stress management and bone health, magnesium plays a foundational role in how we feel every day.
In this guide, we explore the different forms of magnesium, their unique benefits, and how to choose the right delivery method for your needs.
Why Is Magnesium So Important?
Magnesium is required for:
- Muscle and nerve function – including regulating muscle contractions and preventing cramps
- Energy production – it activates ATP, the body's primary energy currency
- Bone health – approximately 60% of the body's magnesium is stored in bones
- Sleep regulation – magnesium supports the production of melatonin and GABA, promoting restful sleep
- Stress response – it helps regulate cortisol and supports the nervous system
- Blood sugar balance – magnesium plays a role in insulin sensitivity
- Heart health – it supports healthy blood pressure and cardiac rhythm
Signs You May Be Low in Magnesium
Magnesium deficiency (hypomagnesaemia) can be subtle. Common signs include:
- Muscle cramps or twitches
- Difficulty sleeping or restless sleep
- Fatigue and low energy
- Anxiety, irritability, or low mood
- Headaches or migraines
- Constipation
- Irregular heartbeat
If you suspect a deficiency, consult your healthcare provider for testing and personalised guidance.
Forms of Magnesium: What's the Difference?
Not all magnesium supplements are the same. The form of magnesium affects how well it's absorbed and what it's best suited for.
Magnesium Glycinate
Highly bioavailable and gentle on the stomach. Ideal for sleep support, anxiety, and general supplementation.
Magnesium Citrate
Well absorbed and commonly used to support bowel regularity. A good all-rounder for general health.
Magnesium Oxide
Lower bioavailability but useful for short-term relief of constipation and heartburn.
Magnesium Malate
Supports energy production and is often recommended for those experiencing fatigue or muscle pain.
Magnesium Chloride (Flakes & Sprays)
Applied topically, magnesium chloride is absorbed through the skin — making it an excellent option for those with sensitive digestive systems or who prefer not to take oral supplements.
Magnesium Crystals (Bath Flakes)
Magnesium bath flakes or crystals are dissolved in warm water for a relaxing foot soak or full bath. This transdermal method allows magnesium to be absorbed directly through the skin, bypassing the digestive system entirely.
Benefits of magnesium crystal soaks:
- Promotes deep muscle relaxation
- Supports restful sleep when used in the evening
- Eases tension and stress
- Gentle and suitable for most people, including those with digestive sensitivities
How to use: Dissolve 1–2 cups of magnesium flakes in a warm bath or a smaller amount in a foot soak. Soak for 20–30 minutes, 2–3 times per week.
Magnesium Sprays
Magnesium oil sprays are a convenient way to apply magnesium directly to the skin. Despite the name, magnesium "oil" is not actually an oil — it's a concentrated solution of magnesium chloride in water that has a slightly oily feel.
Benefits of magnesium sprays:
- Fast and targeted application to specific areas (e.g., legs, shoulders, feet)
- Ideal for post-exercise muscle recovery
- Convenient for daily use
- Can be applied before bed to support sleep
How to use: Spray 5–10 pumps onto clean skin and massage in. Some people experience a mild tingling sensation initially — this is normal and usually subsides with regular use. Leave on for at least 20 minutes before rinsing if desired.
Oral Magnesium Supplements
For those who prefer a traditional supplement, oral magnesium capsules or powders offer a reliable and measurable dose. Look for highly bioavailable forms like glycinate, citrate, or malate for best absorption.
General dosage guidance: The recommended dietary allowance (RDA) for magnesium is approximately 310–420 mg per day for adults, depending on age and sex. Always follow the dosage instructions on your specific product and consult your healthcare provider if you are unsure.
Can You Take Too Much Magnesium?
Oral magnesium in high doses can cause loose stools or digestive discomfort. Topical forms (sprays and crystals) are generally considered very safe as excess is not absorbed. Always stay within recommended dosages for oral supplements and consult a healthcare professional if you have kidney disease or other conditions that affect mineral metabolism.
Explore Our Magnesium Range
Whether you prefer the ritual of a magnesium bath, the convenience of a spray, or the precision of an oral supplement, we have options to suit your lifestyle. Browse our Magnesium Range to find the right product for you.
This article is for educational purposes only and does not constitute medical advice. Please consult a qualified healthcare practitioner for personalised recommendations.