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Magnesium Explained: Why Most UK Supplements Are A Waste of Money

Comparison of magnesium glycinate, citrate and threonate powders with Evopure sleep complex bottle.

Martin Travis |

Updated June 2026

Magnesium Explained: Why Most UK Supplements Are A Waste of Money

You’ve heard the hype: Magnesium is the “miracle mineral” for sleep, anxiety, and recovery. So you bought a cheap bottle from the high street and… nothing happened. Or worse, you spent the night running to the bathroom. Here is the truth: “Magnesium” isn’t just one thing. There are over 10 different forms, and taking the wrong one won’t help your sleep — it will just act as an expensive laxative.

Glycinate vs Citrate vs Threonate: What’s the Difference?

1. Magnesium Citrate (The “Detox” One)

Bound to citric acid. Best for constipation and digestion. Cheap and common, but poor absorption for the brain and muscles. Take this for sleep and you risk waking up with an upset stomach rather than feeling rested.

2. Magnesium Threonate (The “Brain” One)

A newer form developed to cross the blood-brain barrier. Best for cognitive function and memory. Exceptionally expensive and requires a very high dose. Great for focus, less proven for deep physical relaxation.

3. Magnesium Glycinate / Bisglycinate (The “Sleep” One)

Bound to Glycine, an amino acid that acts as an inhibitory neurotransmitter. Best for sleep, anxiety, and muscle recovery. High bioavailability, the glycine component physically lowers body temperature and calms the nervous system. The gold standard for sleep.

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The Verdict: Which is Best for Sleep?

If your goal is to fix your sleep schedule or reduce evening anxiety, Magnesium Bisglycinate is the clear winner. Unlike Citrate, it is gentle on the stomach. Unlike Threonate, it provides a hefty dose of elemental magnesium to relax tight muscles while the glycine calms the racing mind.

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Why We Chose Bisglycinate + Theanine

For our Magnesium Sleep Complex, we didn’t just stop at the best form of magnesium. We stacked it:

  • Magnesium Bisglycinate: For physical relaxation and absorption.
  • L-Theanine: An amino acid found in green tea that promotes “alpha brain waves” (calm focus) without drowsiness.
  • L-Glycine: Added separately to further support deep REM sleep cycles.

This isn’t just a mineral supplement — it’s a nervous system reset switch.

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Not sure which magnesium or sleep formula is right for you?

Take our free quiz and we’ll match you with the right Evopure product for your goals.

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Quick Comparison Table

Type Best Use Absorption Side Effects
Glycinate Sleep & Anxiety High None (Gentle)
Citrate Digestion Medium Laxative Effect
Threonate Memory / Brain High (Brain only) Can be stimulating
Oxide Cost Saving Very Low Stomach Upset

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FAQs: Dosage & Timing

Can I take Magnesium and CBD together?

Yes — we recommend it. Magnesium works on NMDA receptors to relax muscles, while CBD works on the Endocannabinoid system to reduce stress. Together they are the ultimate recovery stack.

How much Magnesium should I take for sleep?

The recommended daily allowance in the UK is around 300–400mg. Our Magnesium Sleep Complex is dosed specifically to hit this sweet spot without causing grogginess.

Is Magnesium Glycinate the same as Bisglycinate?

Technically, yes. Bisglycinate means the magnesium is attached to two glycine molecules, making it even more stable and absorbable. It is the premium form we use.

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Final thoughts

Don’t just take “magnesium.” Take the form that matches your goals. If you want to wake up feeling recharged and ready, ditch the Citrate and upgrade to Glycinate.

Shop Evopure Magnesium Sleep Complex →

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