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 |
Quick Answers
What is the magnesium form of the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g)?
Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) magnesium form: Magnesium bisglycinate.
What is the elemental magnesium of the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g)?
Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) elemental magnesium: 200 mg per serving.
What is the serving size of the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g)?
Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) serving size: 1 scoop (4 g).
What is the servings per container of the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g)?
Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) servings per container: 30.
What is the added sleep ingredients of the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g)?
Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) added sleep ingredients: Melatonin 2.5 mg; L-theanine 50 mg; GABA 100 mg from 125 mg PharmaGABA.
What is the third-party verification of the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g)?
Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) third-party verification: ISURA Verified Clean and Non-GMO.
What is the other ingredients of the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g)?
Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) other ingredients: Citric acid, organic tapioca maltodextrin, natural flavors, stevia leaf extract, rice hull concentrate, organic beetroot juice.
What is the allergen/diet notes of the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g)?
Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) allergen/diet notes: Vegetarian/vegan; label states no dairy, wheat, gluten, soy, sesame, egg, fish, shellfish, animal products or tree nuts.
How much does the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) cost?
The Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) lists at $20.97 at iHerb as of August 5, 2026. Prices change often, so the merchant page shows the current figure.
Who is the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) for?
It suits buyers intentionally seeking a fixed magnesium-and-melatonin combination, people who value independent ISURA verification. It is not the right pick for people avoiding melatonin, buyers wanting a magnesium-only formula.
Is the Natural Factors, Stress-Relax Nighttime Magnesium Bisglycinate Powder with Melatonin, GABA & L-Theanine, Tropical Fruit, 4.23 oz (120 g) worth buying?
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. It ranks #2 in our Top 5 Magnesium Glycinate for Sleep. 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.
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
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Customer Reviews
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