Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g)
One scoop supplies 200 mg of magnesium as bisglycinate plus 2.5 mg melatonin, 50 mg L-theanine and 100 mg GABA from PharmaGABA. It carries the ISURA Verified Clean seal and provides 30 fully disclosed servings.
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Our Verdict
ISURA verification and complete disclosure keep it ahead of the uncertified products on the heavily weighted testing and transparency criteria. It ranks below Thorne because ISURA is less widely recognized than NSF and its L-theanine dose is well below the cited trial dose.
Score Breakdown
Pros & Cons
Pros
- •ISURA Verified Clean provides independent verification beyond an in-house quality statement.
- •All four active ingredients are individually disclosed rather than hidden in a proprietary blend.
- •One scoop supplies the serving, and the label declares a vegan formula free from the listed common allergens.
Cons
- •Its 50 mg L-theanine dose is one quarter of the 200 mg daily dose used in the cited randomized human trial.
- •Every serving fixes melatonin at 2.5 mg, so magnesium cannot be adjusted independently from melatonin.
Specifications
| Magnesium Form | Magnesium bisglycinate |
| Elemental Magnesium | 200 mg per serving |
| Serving Size | 1 scoop (4 g) |
| Servings Per Container | 30 |
| Added Sleep Ingredients | Melatonin 2.5 mg; L-theanine 50 mg; GABA 100 mg from 125 mg PharmaGABA |
| Third-Party Verification | ISURA Verified Clean and Non-GMO |
| Other Ingredients | Citric acid, organic tapioca maltodextrin, natural flavors, stevia leaf extract, rice hull concentrate, organic beetroot juice |
| Allergen/Diet Notes | Vegetarian/vegan; label states no dairy, wheat, gluten, soy, sesame, egg, fish, shellfish, animal products or tree nuts |
Who Is This For?
Best For
- Buyers intentionally seeking a fixed magnesium-and-melatonin combination
- People who value independent ISURA verification
Not For
- People avoiding melatonin
- Buyers wanting a magnesium-only formula
Where to Buy
Appears In
Customer Reviews
Alternatives to Consider
Thorne, Magnesium Bisglycinate, 6.5 oz (187 g)
Thorne
One scoop supplies 200 mg of elemental magnesium as magnesium bisglycinate, and the container provides 60 servings. The exact 187 g powder is listed by NSF Certified for Sport and contains citric acid and monk fruit concentrate, with no melatonin or L-theanine.
NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g)
NOW Foods
One level teaspoon supplies 300 mg of elemental magnesium from Albion magnesium bisglycinate, with approximately 76 servings per container. Citric acid is the only other ingredient, and the $0.19 serving cost is the list's best value per active ingredient.
Doctor's Best, High Absorption Magnesium Lysinate Glycinate, 100 mg, 240 Tablets
Doctor's Best
Two tablets supply 200 mg of elemental magnesium from 2,000 mg of Albion magnesium lysinate glycinate chelate, and the bottle contains 120 servings. The panel distinguishes elemental and compound weight clearly; the full suggested daily use is two tablets twice daily rather than one serving.
NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets
NOW Foods
Two tablets provide 200 mg of elemental magnesium from 2,000 mg of Albion magnesium bisglycinate, with 90 servings per bottle. The formula contains no melatonin or L-theanine and is listed as in stock with 90,000-plus units sold in 30 days.