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Product Reviews > Health & Beauty > Magnesium Supplements
Best Magnesium Supplement in the UK
Discover which formulations deliver results whilst others disappoint
Emma Richardson, MSc. RNutr,
Last updated: 04 January, 2026
EDITORIAL NOTICE: We review Magnesium supplements. We test them based on science, quality, and real customer results. See our guidelines below.
Why You're Almost Certainly Deficient
Here’s the shocking truth: Modern life is literally draining the magnesium from your body.
Every time you:
- Feel stressed (work deadlines, family pressures)
- Drink coffee or alcohol
- Exercise intensely
- Take certain medications
- Eat processed foods
…you’re depleting your magnesium stores.
Making matters worse, today’s vegetables contain 25% less magnesium than they did in 1940 due to soil depletion.
Even if you eat perfectly, you’re likely not getting enough. The result? Your body starts breaking down.
“I was struggling with muscle cramps, restless sleep, and low energy levels, but since I started taking magnesium supplement, I’ve noticed an improvement in all those areas” Michael, 48
The 3 Types of Magnesium That Actually Work
Not all magnesium is created equal. In fact, most supplements use cheap forms your body can barely absorb (hello, magnesium oxide).
Magnesium Glycinate – The Sleep Transformer
- Crosses the blood-brain barrier easily
- Calms racing thoughts and anxiety
- Promotes deep, restorative sleep
- Gentle on the stomach (no emergency bathroom trips)
“I’m sleeping much better since taking these and the duration of deep sleep has tripled from 30 mins to an hour and a half” – David, 41
Magnesium Citrate – The Energy Booster
- Highest absorption rate
- Rapidly replenishes depleted stores
- Supports cellular energy production
- Helps regulate digestive health
“Stopped me over sleeping and feeling tired in the morning” – Emma, 39
Magnesium Malate – The Muscle Soother
- Specifically targets muscle tissue
- Reduces cramps and restless legs
- Supports exercise recovery
- Enhances overall vitality
“Got cramps on my both legs early morning just before I got out of bed… I do sleep better and wake up with no problems at all!!” – James, 55
The Synergy Secret: Why Most Supplements Fail
Here’s what the £5 bottles at Boots won’t tell you: Taking just one form of magnesium is like trying to fill a bucket with holes in it. Each form serves a different purpose. Miss one, and you’re leaving critical benefits on the table.
But there’s more. Research shows that certain nutrients dramatically enhance magnesium absorption:
- Vitamin D3: Works synergistically with magnesium (and Vitamin D deficiency is common in winter)
- Zinc: Increases magnesium uptake at the cellular level
Without these co-factors, you’re literally flushing supplements down the toilet.
We Tested the Top Magnesium Brands
Our team analysed the 5 best-selling magnesium supplements in the UK, evaluating them on:
- Bioavailable forms (not cheap oxide)
- Optimal dosing (200-225mg elemental magnesium)
- Essential co-factors (D3 and Zinc)
- Manufacturing standards (UK-made preferred)
- Customer experiences (real results, not just claims)
- Value and guarantee (confidence in their product)
Each supplement was rigorously evaluated across all criteria. Here are our findings:
Our Analysis: Top 5 Magnesium Supplements
PROS
- Made in the UK
- 3 forms of Magnesium
- With Vitmin D3 & Zinc
- 225 mg of Elemental Magnesium per serving
- Vegan Friendly
- Free UK Delivery
- 30 Day Money Back Guarantee
CONS
- Only Available Online
- Available in the UK only
The Bottom Line
Among the top magnesium supplements we’ve reviewed, Nutracene Magnesium Complex stands out as a leader in both quality and comprehensive formulation.
Each serving provides a powerful 225 mg dose of elemental magnesium from three highly bioavailable forms, including Magnesium Glycinate, Magnesium Malate, and Magnesium Citrate. This multi-form approach ensures optimal absorption and targets different bodily functions – glycinate for relaxation and sleep, malate for energy production, and citrate for general bioavailability.
What sets Nutracene apart is its synergistic formula enhancement. The supplement includes Zinc and Vitamin D3, which work together with magnesium to improve absorption and maximize effectiveness. This combination is backed by clinical research showing that these nutrients work better together than in isolation.
Manufactured in the UK to GMP standards, Nutracene delivers a pure, high-potency magnesium supplement with no unnecessary fillers or artificial additives. The capsules are easy to swallow and the dosing is convenient at just 2 capsules daily.
Plus, with a 30-day money-back guarantee, you can try it risk-free and experience the benefits of proper magnesium supplementation firsthand.
* Rankings and results are based on personal opinions and may not represent typical user experiences. For more information, please refer to the official product website.
Magnesium Glycinate
by Pure Encapsulations
TOTAL RANKING
B+
OVERALL GRADE
PROS
- Reasonably Priced
- Vegan Friendly
- Gentle on the Stomach
CONS
- Only One Form of Magnesium
- No Zinc or Vitamin D3
- Modest dosage of 120mg
The Bottom Line
Pure Encapsulations’ Magnesium (Glycinate) is a simple, clean supplement that focuses on providing one of the most bioavailable forms of magnesium available. Magnesium glycinate is especially popular because it’s gentle on the stomach and less likely to cause laxative effects than cheaper forms. It’s a great pick for people looking for support with muscle relaxation, stress, or better sleep, and Pure Encapsulations is known for its no-nonsense, hypoallergenic formulas, which is a big plus for anyone with sensitivities.
3. Magnesium Glycinate
by Naturelo
TOTAL RANKING
B+
OVERALL GRADE
PROS
- Vegan Friendly
- No Artificial Flavours
- 3 Forms of Magnesium
CONS
- No Synergistic ingredients
- Not for high performance needs
The Bottom Line
NATURELO’s Magnesium Complex stands out for taking a whole food-based approach to magnesium. Instead of using just one isolated form, it combines multiple magnesium-rich sources, including magnesium derived from organic vegetables and seeds like spinach, swiss chard, and flaxseed. This gives the supplement a natural feel that appeals to anyone who prefers food-based nutrients over purely synthetic forms.
The inclusion of different magnesium sources means it may be better absorbed. Many people find it helpful for muscle relaxation, stress relief, and sleep support. Plus, NATURELO is known for keeping its formulas non-GMO, vegan-friendly, and free from artificial additives, which is a definite plus if you have sensitivities.
4. Magnesium Complex
by Vegaverro
TOTAL RANKING
C+
OVERALL GRADE
PROS
- Vegan Friendly Formula
- No Artificial Flavours
- Multiple forms of Magnesium
CONS
- No Added Co-Factors
- No Money Back Guarantee
- Foreign Brand
The Bottom Line
Vegavero’s Magnesium Bisglycinate is a straightforward, vegan-friendly magnesium supplement that focuses on high bioavailability and gentle absorption. Magnesium bisglycinate is widely known for being easy on the stomach, making it a good pick for people who want help with muscle relaxation, stress management, or sleep support without digestive discomfort.
One standout for Vegavero is their clean, plant-based approach. The capsules are 100% vegan, free from GMOs, artificial additives, or allergens, and the brand is known for its commitment to sustainability and transparency. The dose is also decent for everyday magnesium maintenance.
5. Magnesium Glycinate
by Nutri Advanced
TOTAL RANKING
C+
OVERALL GRADE
PROS
- Vegan Friendly
- Clean Formula
CONS
- Single Magnesium Form
- 500mg per dose
- No Additional Nutrients
The Bottom Line
Nutri Advanced’s Magnesium Glycinate is a solid choice if you’re looking for a highly bioavailable form of magnesium that’s easy on the stomach. Magnesium glycinate is well known for its good absorption and gentle effect on digestion, making this supplement popular for people who want to ease muscle tension, manage stress, or sleep better without the laxative side effects of cheaper magnesium forms.
One of the strengths of Nutri Advanced as a brand is that they’re known for clean formulations with no unnecessary fillers, which is reassuring for anyone with food sensitivities or allergies. The tablets also deliver a decent daily dose, so you won’t need to take too many at once.
Amongst the top magnesium supplements we’ve reviewed, Nutracene stands out as a leader in both quality and comprehensive support.
Each serving delivers a well-balanced blend of three highly bioavailable forms of magnesium, combined with Zinc and Vitamin D3 for added bone, sleep, and immune benefits.
MADE IN THE UK
FREE UK
DELIVERY
MADE TO GMP
STANDARDS
References:
Magnesium Supplementation and Sleep Quality: Citation: Abbasi, B., Kimiagar, M., Sadeghniiat, K., Shirazi, M. M., Hedayati, M., & Rashidkhani, B. (2012). The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. Journal of Research in Medical Sciences, 17(12), 1161–1169. https://pmc.ncbi.nlm.nih.gov/articles/PMC3703169/
Magnesium Supplementation and Muscle Soreness: Citation: Reno, A. M., Green, M., Killen, L. G., O’Neal, E. K., Pritchett, K., & Hanson, Z. (2022). Effects of magnesium supplementation on muscle soreness and performance. Journal of Strength and Conditioning Research, 36(8), 2198–2203. https://pubmed.ncbi.nlm.nih.gov/33009349/
Magnesium and Sleep Health: Citation: Barbagallo, M., & Dominguez, L. J. (2010). Magnesium and aging. Current Pharmaceutical Design, 16(7), 832–839. https://pubmed.ncbi.nlm.nih.gov/33573164/
Magnesium and Vitamin D Synergy: Citation: Rosanoff, A., Weaver, C. M., & Rude, R. K. (2012). Suboptimal magnesium status in the United States: Are the health consequences underestimated? Nutrition Reviews, 70(3), 153–164. https://pubmed.ncbi.nlm.nih.gov/22364157/
Magnesium and Nervous System Support: Citation: Barbagallo, M., & Dominguez, L. J. (2010). Magnesium and aging. Current Pharmaceutical Design, 16(7), 832–839. https://pubmed.ncbi.nlm.nih.gov/33573164