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Product Reviews > Health & Beauty > Magnesium Supplements
The Most Effective Magnesium Supplements 2025
Struggling with stress, poor sleep or muscle tension? Magnesium might be the missing piece in your wellness puzzle. This essential mineral plays a crucial role in over 300 bodily processes, yet studies show that around 60% of us aren't getting enough from our diet alone.
Sarah Maxwell
MSc, RNutr - Nutritionist & Health Expert
Last updated: 17 February 2025
The right supplement should provide optimal absorption without stomach upset. Let our comprehensive analysis guide you to the ones that actually work.
(The Adviser)
How do you judge which is the best?
There’s a plethora of supplements on the market, making it hard to narrow down which will deliver the best results. Trying them all would cost a small fortune. That's why we've done the hard work for you with our in-depth, rigorous research. We looked at many different magnesium supplements to form this review, awarding points for ingredients (and their dosages), price, subscription models, packaging, manufacturing facilities, customer satisfaction, reviews and delivery times. Read on to discover our final verdict.
Will a sleep supplement really work for me?
Doctors are more and more regulary putting patients on extremely strong pharmiceuticals to manage sleep issues. These drugs are not suitable for long term use and come with a plethora of health risks when taken this way.
But, over the last century, scientists and researchers have discovered that numerous natural ingredients can have a truly positive effect on the quality of our sleep. A good sleep supplement can be life changing for anyone suffering with sleep problems.
Overall Winner
Best Magnesium Supplement
Magnesium Complex
A clear winner. With 300mg of elemental magnesium per serving this comprehensive supplement ensures maximum benefits.
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Marine Magnesium
A good second place. However, the use of magnesium hydroxide, while natural, typically shows lower absorption rates.
Read more ⟶
Magnesium Citrate
The single-form approach misses opportunities for synergistic benefits that multiple magnesium forms could provide.
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Wild Magnesium
With just 80mg of elemental magnesium per serving, users would need to take 3-4 servings daily to reach recommended intake levels.
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Viridian Magnesium
While the gentle formulation may suit those with sensitive stomachs, the single-form approach and higher cost per serving make it less competitive
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The problem with most magnesium supplements
Not all magnesium supplements are created equal. With different forms, dosages and formulations available, choosing the right one can feel overwhelming. Many magnesium supplements fall short for several key reasons:
- Using poorly absorbed forms of magnesium
- Including unnecessary fillers and bulking agents
- Providing inadequate dosages
- Causing digestive discomfort
- Offering only a single form of magnesium
- Hard-to-swallow tablet sizes
The right supplement should provide optimal absorption without stomach upset. Let our comprehensive analysis guide you to the ones that actually work.
Which forms of magnesium actually work?
Magnesium Glycinate
Highly absorbable and gentle on the stomach, ideal for stress and sleep support.
Magnesium Citrate
Well-absorbed form that supports energy production. It helps the body maintain hydration balance.
Magnesium Malate
Excellent for muscle function and recovery. Beneficial for those with chronic fatigue or fibromyalgia.
Magnesium Oxide
Common but less bioavailable form. Often used to achieve higher levels of elemental magnesium.
Important: Understanding magnesium content
When comparing magnesium supplements, it's crucial to look at the elemental magnesium content - not just the total compound weight. Here's why:
- Elemental magnesium is the actual amount of pure magnesium you're getting
- Different magnesium compounds contain varying amounts of elemental magnesium
- Daily recommendations (300mg for men, 270mg for women) refer to elemental magnesium
- Many supplements list total compound weight, which can be misleading
For example, a supplement might advertise "1000mg of magnesium citrate" but only provide 160mg of elemental magnesium. Always check the elemental content when comparing products.
What should I look for in my magnesium supplement?
- Highly bioavailable magnesium forms
- Clinically effective dosages
- Clean formula without unnecessary additives
- Easy-to-swallow capsules
- Made in UK under GMP standards
- Money-back guarantee
- Clear, transparent labelling
What should I avoid in my magnesium supplement?
- Poorly absorbed magnesium forms
- Excessive fillers and bulking agents
- Inadequate dosages
- Large, difficult-to-swallow tablets
- Unclear labelling of elemental magnesium content (see above)
- Products causing digestive issues
Our top 5 magnesium supplement picks for 2025:
Overall Winner
Best Magnesium Supplement
Overall Winner
Best Magnesium Supplement
1. Magnesium Complex
by Extracted
Based on 30 day tests, reviews, quality, customer care and price.
Based on 30 day tests, reviews, quality, customer care and price.
A+
Overall Grade
Pros
- Contains 3 highly bioavailable forms of magnesium (glycinate, citrate, malate)
- Optimal 300mg elemental magnesium dosage
- Superior absorption compared to standard magnesium supplements
- Clean formula with no artificial fillers or additives
- Gentle on the stomach
- Can be combined with other supplements like Sleepee
- Made in the UK to GMP standards
- Vegetarian friendly
- Subscription options available
Cons
- Only available online
- Express delivery is only available in the UK
- Premium pricing reflects high-quality ingredients
Ranking breakdown
The ingredients in this complex and the clear elemental labelling resulted in this Magnesium Complex being our number one pick (Copyright Extracted)
Overview
Magnesium Complex stands out for its innovative triple-magnesium formula, combining the most bioavailable forms: glycinate for optimal absorption and stress support, citrate for energy production and malate for muscle function. This comprehensive approach ensures maximum benefits across all key areas of magnesium supplementation.
With 300mg of elemental magnesium per serving, it hits the sweet spot for optimal daily intake. The clean formula, free from unnecessary fillers, demonstrates Extracted's commitment to quality. Users consistently report improved sleep, reduced muscle tension and better stress management without the digestive issues common with other magnesium supplements.
While the premium pricing reflects the high-quality ingredients, flexible subscription options make it more accessible for long-term use. For those seeking the most effective and well-rounded magnesium supplement, Magnesium Complex is clearly the gold standard.
2. Atlantic Marine Magnesium
by Higher Nature
Based on 30 day tests, reviews, quality, customer care and price.
Based on 30 day tests, reviews, quality, customer care and price.
B
Overall Grade
Pros
- Natural marine source
- Contains 70+ trace minerals
- One-a-day formula
- 300mg dosage
- No artificial additives
Cons
- Single form of magnesium (hydroxide)
- Limited customer reviews
- May not be suitable for vegetarians
- Less proven absorption rate
- Higher price point
Ranking breakdown
Overview
Higher Nature's marine-sourced magnesium offers an interesting natural approach, with the added benefit of trace minerals. The one-a-day dosing is convenient, and the 300mg serving size is appropriate. However, the use of magnesium hydroxide, while natural, typically shows lower absorption rates compared to other forms. While marine magnesium, derived from seawater, is a natural source of magnesium and generally considered safe, excessive intake can lead to digestive issues like diarrhea, nausea, and vomiting, particularly if the form has low bioavailability.
The limited customer feedback makes it difficult to gauge real-world effectiveness. While the additional trace minerals are a nice bonus, they may not compensate for the potentially lower bioavailability of the primary ingredient.
Based on 30 day tests, reviews, quality, customer care and price.
Based on 30 day tests, reviews, quality, customer care and price.
C
Overall Grade
Pros
- High potency (400mg)
- Suitable for vegans and vegetarians
- Kosher certified
- Well known brand
Cons
- Tablets too large to swallow comfortably
- Contains multiple bulking agents and fillers
- Single form of magnesium only
- May cause digestive discomfort
- Reports of choking hazard
Ranking breakdown
Overview
Solgar's magnesium citrate tablets are notably large, making them difficult to swallow comfortably, with some users even reporting a choking hazard. The formula contains multiple bulking agents and fillers, adding unnecessary ingredients.
While the 400mg dose seems impressive, the single-form approach misses opportunities for synergistic benefits that multiple magnesium forms could provide.
Based on 30 day tests, reviews, quality, customer care and price.
Based on 30 day tests, reviews, quality, customer care and price.
C
Overall Grade
Pros
- Natural food-grown formula
- Clean, ethically sourced ingredients
- Vegan-friendly
- Refillable glass bottle packaging
- No artificial additives
Cons
- Low potency (only 80mg elemental magnesium)
- Limited data on bioavailability
- Extremely expensive for potency offered
- No money-back guarantee
- Requires multiple capsules for optimal dosage
Ranking breakdown
Overview
Wild Nutrition's approach to "food-grown" magnesium is innovative and environmentally conscious. However, with just 80mg of elemental magnesium per serving, users would need to take 3-4 servings daily to reach recommended intake levels. This makes an already premium-priced product even more costly for adequate supplementation.
While the concept of food-grown nutrients is appealing, the lack of data on bioavailability raises questions about effectiveness. The premium pricing, combined with the need for multiple capsules, makes this a costly option for daily supplementation.
Based on 30 day tests, reviews, quality, customer care and price.
Based on 30 day tests, reviews, quality, customer care and price.
D
Overall Grade
Pros
- Gentle bisglycinate form
- Clean formula with minimal ingredients
- Vegetarian capsules
- Good digestive tolerance
Cons
- Low dosage (140mg per serving)
- Single form of magnesium
- Limited customer feedback
- Requires multiple capsules
- Higher cost per serving
Ranking breakdown
Overview
Viridian's choice of magnesium bisglycinate shows understanding of absorption and tolerability. The clean formula and minimal ingredients align with their reputation for quality. However, the low dosage per serving means users need multiple capsules to reach optimal intake levels.
While the gentle formulation may suit those with sensitive stomachs, the single-form approach and higher cost per serving make it less competitive compared to more comprehensive options.
The final word
When it comes to magnesium supplementation, form and bioavailability matter as much as dosage. Our analysis reveals that while each product has its merits, Magnesium Complex by Extracted stands apart for its innovative triple-magnesium formula, optimal dosing and superior absorption.
The combination of glycinate, citrate and malate forms provides comprehensive benefits for sleep, energy, muscle function and stress management. While premium priced, its effectiveness and clean formulation make it a worthwhile investment in your health.
Remember, magnesium supplementation works best as part of a balanced approach to nutrition and wellness. But for those seeking the most effective and well-rounded magnesium supplement available, Magnesium Complex offers the complete package.
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*The information contained within this site is not intended as a substitute for professional medical advice. If you have, expect to have, or suspect you may have any medical condition, you are urged to consult with a health care provider. These statements have not been evaluated by the Food and Drug Administration or the European Food Safety Authority. These products are not intended to diagnose, treat, cure, or prevent any diseases or medical conditions. Results are based on the opinion of the author and their own rankings and do not necessarily reflect typical results from the use of these products. Trademarks used on our website belong to their respective owners and no implied or expressed endorsement of our website or services is intended. Rankings can be affected by the relationship or ownership interest we have in various products featured.
MARKETING DISCLOSURE: This website is a blog. As such you should know that the we have a monetary connection and the same ultimate beneficial owners (UBO) as some of the products we recommend on this site, including the #1 pick/partner on this blog post (Magnesium Complex). We may receive payments from direct sales of these products or commissions whenever a qualified sale occurs on any of featured sites, including sales from properties owned by the same UBO's, along with other partners through the Amazon Associates program.
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