Natural Factors, Stress-Relax, Nighttime Magnesium Bisglycinate
One scoop contains 200 mg elemental magnesium as bisglycinate plus 100 mg GABA, 50 mg L-theanine and 2.5 mg melatonin, with every active disclosed. It is explicitly labeled for bedtime and carries the ISURA Verified Clean and Non-GMO marks. This is a multi-ingredient sleep formula, not a magnesium-only product.
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Our Verdict
It is second because the independent ISURA program, pure bisglycinate form and complete active-dose disclosure are strong on the highest-weighted criteria. Thorne stays ahead through the more directly searchable product-and-lot NSF certification.
Score Breakdown
Pros & Cons
Pros
- •ISURA is an independent not-for-profit verification program with an ISO 17025-accredited laboratory
- •Uses magnesium bisglycinate and declares 200 mg elemental magnesium per scoop
- •Fully discloses GABA 100 mg, L-theanine 50 mg and melatonin 2.5 mg
Cons
- •The fixed 2.5 mg melatonin dose prevents using it as a magnesium-only supplement
- •Costs $0.70 per 200 mg serving, or about $0.35 per 100 mg elemental magnesium
Specifications
| Elemental magnesium | 200 mg per serving |
| Magnesium form | Magnesium bisglycinate |
| Serving size | 1 scoop (4 g) |
| Servings per container | 30 |
| Added sleep ingredients | GABA 100 mg; L-theanine 50 mg; melatonin 2.5 mg |
| Third-party verification | ISURA Verified Clean and Non-GMO |
| Other ingredients / allergens | Citric acid, organic tapioca maltodextrin, natural flavors, stevia, rice hull concentrate, organic beetroot juice; label excludes dairy, wheat, gluten, soy, sesame, egg, fish, shellfish, animal products and tree nuts |
Who Is This For?
Best For
- Buyers specifically seeking a labeled bedtime blend
- People who intentionally want magnesium, melatonin, GABA and L-theanine together
Not For
- People avoiding melatonin or multi-ingredient formulas
- Anyone who needs to remain alert after taking it
Where to Buy
Appears In
Customer Reviews
Alternatives to Consider
Thorne, Magnesium Bisglycinate, 6.5 oz (187 g)
Thorne
Each scoop supplies 200 mg of elemental magnesium as magnesium bisglycinate, with citric acid and monk fruit as the only other ingredients. The label positions the powder for pre-bedtime use, and the exact 187 g product is listed in NSF's Certified for Sport directory.
California Gold Nutrition, Magnesium Glycinate, 133 mg, 180 Capsules
California Gold Nutrition
The Supplement Facts panel declares 400 mg elemental magnesium from magnesium glycinate per three-capsule serving and no added melatonin, GABA or L-theanine. iHerb marks the SKU iTested and offers a product certificate. The overview also calls the formula buffered without naming a separate buffering salt, which reduces form transparency.
KAL, Chelated Magnesium Bisglycinate, 180 Tablets
KAL
Three tablets provide 315 mg elemental magnesium from fully chelated magnesium bisglycinate, with no added sleep actives. The label markets relaxation support and makes the elemental amount clear. KAL says it is lab-tested for purity and potency, but no named independent certification or public product-specific certificate was found.
Doctor's Best, High Absorption Magnesium, 100 mg, 240 Tablets
Doctor's Best
Two tablets supply 200 mg elemental magnesium from 2,000 mg Albion TRAACS magnesium lysinate glycinate chelate. The product is marketed for muscle relaxation and sleep support and contains no added melatonin, GABA or L-theanine. Its suggested adult use is two tablets twice daily, so the labeled daily regimen is four tablets and 400 mg elemental magnesium.