Spectrum 5 Magnesium
- Magnesium
- Capsule
- 60
- Sleep Support
A multi-form magnesium and trace mineral capsule aimed at general and sleep-related support, backed by stated third party testing and GMP certification.
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How it ranks among the 108 magnesium we track
4.6★ across 1,100 Amazon ratings, Bayesian-smoothed toward the category average.
1,100 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
10,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 108 magnesium we track - how the scorecard works · full magnesium data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Spectrum 5 combines several forms of magnesium, including citrate, glycinate, hydroxide and malate, with 72 trace minerals sourced from Irish sea water, dosed at 500mg per serving across 60 capsules and marketed for sleep support.
Blending multiple magnesium forms in one capsule is meant to combine how each type behaves, since forms like glycinate and citrate are generally handled differently by the body than hydroxide. The listing states the product is made in the USA, third party tested and GMP certified, which are checkable manufacturing claims rather than marketing language. The attribute data cuts off before naming the fifth magnesium form in the 5-in-1 blend, so it is not repeated here.
- 500mg per serving
- 5-in-1 magnesium blend
- 72 trace minerals, Irish sea sourced
- Third party tested, GMP certified, made in USA
Who it's for
Fits someone who wants a broad magnesium blend plus trace minerals in a single capsule rather than a single-form product like magnesium glycinate alone. Less suited to anyone who wants to dose one specific magnesium form for a targeted reason, since this is a mixed blend.
Strengths and trade-offs
Drawn from this product's published specifications.
- Combines multiple magnesium forms in one capsule
- Includes 72 trace minerals from sea-sourced material
- Third party tested and GMP certified
- Made in USA
- Fifth magnesium form isn't fully specified in the data
- 500mg serving is a blended total, not a single form dose
- No reviews attached to confirm sleep support claims
Performance notes
Different magnesium forms are absorbed and tolerated differently, so combining citrate, glycinate, hydroxide and malate in one formula is intended to spread that variability across the blend rather than rely on a single form. The Irish sea sourced trace minerals add a broader mineral profile alongside the magnesium itself. Third party testing and GMP certification, as stated in the listing, point to manufacturing oversight beyond the ingredient list.
Specifications
| Brand | Spectrum |
|---|---|
| Model | MAGCAP-Parent1 |
| Form | Capsule |
| Supplement Type | Magnesium Citrate, Magnesium Glycinate, Magnesium Hydroxide, Magnesium Malate, M |
| Count | 60 |
| Benefits | Sleep Support |
| Flavor | Unflavored |
How it compares
This product against the closest alternatives we track in magnesium.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Spectrum 5 MagnesiumThis product | 4.6 / 5 | 1,100 | 4.4 / 5 |
| Nature Made Magnesium Oxide 250 mgNATURE | 4.7 / 5 | 34,500 | 4.6 / 5 |
| NaturalSlim MagicMag Magnesium Citrate Powder for StressNaturalSlim | 4.7 / 5 | 26,700 | 4.6 / 5 |
| NOW Supplements, Magnesium Citrate, Enzyme Function*, Nervous System Support*, 120 Veg…Now | 4.7 / 5 | 25,200 | 4.6 / 5 |
| Life Extension Magnesium CapsLife | 4.7 / 5 | 16,700 | 4.6 / 5 |
Similar magnesium from other brands
Questions about the Spectrum MAGCAP-Parent1
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What forms of magnesium are in Spectrum 5 Magnesium?
The blend lists magnesium citrate, glycinate, hydroxide and malate among its forms.
Is Spectrum 5 Magnesium third party tested?
Yes, the listing states it is third party tested and GMP certified.
Where are the trace minerals sourced from?
The listing states they are Irish sea sourced.