This nighttime formula pairs **Magnesium** at 200mg with **Melatonin** at 2.5mg — both comfortably within their clinical ranges for sleep support. The magnesium comes as a glycinate-oxide blend, so you're getting a mix of well-absorbed and poorly-absorbed forms rather than pure glycinate. At 200mg elemental, it's enough to contribute meaningfully to relaxation and muscle function, especially if your diet already covers part of your daily need.
**GABA** is sourced from PharmaGABA, a fermented form that may absorb better than synthetic versions. At 100mg you're at the floor of the studied range — enough to potentially take the edge off, though the evidence for oral GABA crossing the blood-brain barrier is still debated. **Melatonin** at 2.5mg is a moderate dose that should help with sleep onset without the grogginess that higher doses can cause.
The weakest link is **L-Theanine** at just 50mg — half the minimum clinical dose of 100mg used in relaxation studies. If calming support from theanine is important to you, you'd need to supplement it separately to reach the 100–200mg range where the research shows benefit.
Natural Factors
Stress-Relax Nighttime Magnesium Glycinate With Melatonin, GABA & L-Theanine
Capsule · 30 servings · $0.65/serving
Supports
Score Breakdown
Ingredients (4)
Optimal dose
Optimal dose · Premium form
Within effective range · Premium form
50% of effective dose
Label Nutrition Facts
Active Ingredients
From the label · % Daily Value
Magnesium200 mg
Gamma-aminobutyric acid (GABA)100 mg
L-Theanine50 mg
Melatonin2.5 mg
Other Ingredients
Fillers, coatings, and additives
Magnesium StearateLubricant
Silicon DioxideAnti-caking
Rice FlourFiller
Stearic AcidLubricant
vegetarian capsule (hypromellose, purified water)
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.