Magnesium Glycinate 400mg vs Calcium Magnesium plus Zinc 250 Tablets
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Magnesium Glycinate 400mg and Calcium Magnesium plus Zinc 250 Tablets.
Last verified: 07 Apr 2026 · Based on 130 reviews
Magnesium Glycinate 400mg scores 80.0/100 vs Calcium Magnesium plus Zinc 250 Tablets at 74.0/100. Magnesium Glycinate 400mg wins on ingredient quality, certifications. Calcium Magnesium plus Zinc 250 Tablets is stronger on effectiveness and value for money.
Which is better: Magnesium Glycinate 400mg or Calcium Magnesium plus Zinc...?
Solgar Magnesium Glycinate wins with a higher overall score (80 vs 74) and superior ingredient quality (88 vs 66), thanks to its well-absorbed chelate form. The Calcium Magnesium plus Zinc is worth considering for women over 40 needing combined bone support, or those on a tighter budget at £9.22 versus £12.25.
— AIScored Editorial Team
How Do the Scores Compare?
Magnesium Glycinate 400mg
Solgar
|
Calcium Magnesium plus Zinc...
Solgar
|
|
|---|---|---|
| Overall Score | 80.0 | 74.0 |
| Effectiveness | 79.0/100 |
80.0/100
Best
|
| Ingredient Quality |
88.0/100
Best
|
66.0/100 |
| Value for Money | 70.0/100 |
73.0/100
Best
|
| Side Effects | 76.0/100 |
87.0/100
Best
|
| Certifications |
84.0/100
Best
|
55.0/100 |
| Best Price | £12.25 Amazon UK → |
£9.22
Amazon UK →
Cheapest
|
| Form | N/A | tablet |
| Dose | N/A | None |
| Third-Party Tested | ✗ No | ✗ No |
| Reviews Analysed | 76 | 54 |
Magnesium Glycinate 400mg
Pros
- ✓Strong user-reported improvement in sleep quality — faster onset and fewer nighttime awakenings
- ✓Effective at reducing leg cramps, muscle tension, and post-exercise soreness
- ✓Glycinate chelate offers high bioavailability and is generally gentle on the digestive system
- ✓Clean, minimal formula — gluten-free, dairy-free, non-GMO, kosher-certified; trusted Solgar brand
Cons
- ✗Paradoxical insomnia or restless sleep in a subset of users, possibly linked to MTHFR mutations or glycine sensitivity — magnesium threonate may suit these individuals better
- ✗Large tablet/capsule size noted as inconvenient by multiple reviewers
- ✗Premium brand pricing is higher than comparable chelated magnesium products
- ✗High doses may disrupt calcium balance, contributing to eye twitching or muscle symptoms in some users
Best For
Calcium Magnesium plus Zinc 250 Tablets
Pros
- ✓Consistently reported reduction in muscle cramps and nighttime leg spasms
- ✓Multiple reviewers note improved sleep depth and relaxation
- ✓Premium glass jar packaging widely praised as eco-friendly and quality-signalling
- ✓Clean label — no artificial additives, non-GMO, vegan, soy and wheat free
Cons
- ✗Tablets are notably large; frequently mentioned as a usability downside
- ✗Magnesium oxide included in the blend is the least bioavailable magnesium form
- ✗Calcium partially as carbonate — less well absorbed than citrate, especially without food
- ✗No independent third-party testing (e.g. NSF, Informed Sport)
Best For
What does the data say about Magnesium Glycinate 400mg vs Calcium Magnesium plus...?
Solgar's Magnesium Glycinate 400mg earns an 88/100 for ingredient quality, which is the real reason to choose it over the brand's own Calcium Magnesium plus Zinc. Glycinate is a chelated form, meaning the magnesium is bound to glycine and absorbs well without upsetting the stomach. The combo tablet, by contrast, includes magnesium oxide — the cheapest and least bioavailable form available — which partly explains its lower ingredient quality score of 66/100. The glycinate product scores 80/100 overall at £12.25; the combo sits at 74/100 for £9.22.
If your main concern is sleep or muscle cramps, the Magnesium Glycinate 400mg is the better pick. Users report faster sleep onset and fewer nighttime awakenings, and it scores 79/100 for effectiveness. That said, a small number of people experience the opposite effect — worsened sleep — which appears linked to glycine sensitivity. The Calcium Magnesium plus Zinc edges it on effectiveness at 80/100 and value at 73/100 versus 70/100, making it worth considering if bone and dental support alongside sleep is what you're after, or if the lower price point matters.
Both products involve large tablets, and reviewers of both mention this as a genuine inconvenience. Neither is going to win any awards for easy swallowing. The combo product does come in a glass jar, which several buyers specifically appreciated. Worth knowing if you're under chronic stress or have restless legs: the glycinate formulation has more targeted user feedback for those conditions than the multi-mineral blend does.
Solgar Magnesium Glycinate 400mg is a premium chelated magnesium supplement widely praised by reviewers for improving sleep quality, reducing muscle cramps, and easing nervous tension.
What are the key differences?
Frequently Asked Questions
Which is better, Magnesium Glycinate 400mg or Calcium Magnesium plus Zinc 250 Tablets? ▼
Is Magnesium Glycinate 400mg worth the price compared to Calcium Magnesium plus Zinc 250 Tablets? ▼
Which has fewer side effects? ▼
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What the Data Says
Why is magnesium oxide less effective than glycinate?
Oxide scores 21 points lower than glycinate in our testing — and it's not close on ingredient quality either. Across 17 magnesium products in our database, glycinate averages 74.3/100 overall. Oxide sits at 53/100. That's a gap you can feel.
The ingredient quality difference is even starker: 83.3 for glycinate vs 37.0 for oxide. A 46.3-point gap. The best glycinate in our database, Solgar Magnesium Glycinate 400mg, scores 80/100 overall with 88/100 on ingredient quality. The oxide product (Nature Made) manages just 52 on effectiveness and 37 on ingredient quality.
The reason is bioavailability. Magnesium oxide has roughly 4% absorption — most of it passes straight through your gut unused. Glycinate is chelated (bound to the amino acid glycine), which your intestines absorb much more efficiently. You also get fewer digestive side effects, since unabsorbed magnesium in the gut is what causes the laxative effect oxide is known for.
Oxide is cheap, which is why it's still everywhere. But cheap per pill means nothing if your body can't use it. Glycinate or citrate (avg 74.5/100) are both better choices.
Which form of magnesium is best for sleep, anxiety, or muscle cramps?
Glycinate for sleep and anxiety. Citrate for cramps. L-threonate for brain function. Each form has a different strength, and our scores back this up.
Sleep and anxiety → Glycinate. Averaging 74.3/100 across our database, with the best (Solgar Glycinate 400mg) hitting 80/100. Glycine, the amino acid it's bound to, acts as an inhibitory neurotransmitter — it calms your nervous system on its own. That's a two-for-one benefit you don't get from other forms. Thorne Bisglycinate (74/100) is another solid option at a lower dose.
Muscle cramps → Citrate. Averaging 74.5/100 overall with 85.0 on ingredient quality. Citrate absorbs well and is gentler on your wallet than glycinate. Solgar Citrate leads the pack at 77/100. If cramps are your main issue, this is the practical choice.
Brain function → L-Threonate. Life Extension Neuro-Mag scores 73/100. This is the only form shown to meaningfully raise magnesium levels in the brain by crossing the blood-brain barrier. It's pricier, but nothing else does what it does.
All-round absorption → Doctor's Best High Absorption tops our entire magnesium database at 82/100 overall (83 effectiveness, 88 ingredient quality) using chelated magnesium.
The one form to skip? Oxide at 53/100. Its 4% absorption rate makes it a poor choice no matter what you're taking it for.
Disclaimer: AIScored provides data-driven comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.
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