$19.19 $0.91 per serving
Product analysis
Relax Magnesium Powder Berry may support calmness and modest improvements in sleep, especially when magnesium intake is low. The serving is relatively costly for its main ingredients.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality43
Magnesium citrate has reasonably favourable absorption characteristics. GABA and theanine preparations are not identified consistently enough to compare their form quality confidently.
Ingredient Transparency75
All ingredient amounts are listed, supporting serving comparisons. The GABA and theanine forms are not stated alongside them, leaving their preparations less clear.
Value For Money30
The serving is relatively costly for magnesium, GABA and theanine. Combining them does not by itself establish better value or a greater benefit.
Customer Satisfaction83
Customer feedback is positive across a sizeable number of ratings. That provides a broad picture of satisfaction without showing a predictable calming or sleep effect.
Product Focus61
Calming and possible sleep support are the clearest roles, although benefits remain uncertain and some amounts are below those used in the relevant small trials. Broader claims about focus, hormones or energy are less well established.
- Format
Powder - Container
- 4 Ounce(s)
- Per serving
- $0.91
- Customer rating
- 4.7 · 1,593 ratings
Goals
Impact
Highest effect
Magnesium · 300 mgTheanine · 100 mg
Impact
High effect
Magnesium · 300 mg
Impact
High effect
Magnesium · 300 mgGABA · 100 mgTheanine · 100 mg
Impact
High effect
Magnesium · 300 mg
Impact
Moderate effect
Magnesium · 300 mgTheanine · 100 mg
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Magnesium (Magnesium Citrate) | 300 mg | |
GABA | 100 mg | |
L-Theanine | 100 mg |
Theanine · 100 mg OverallScore76
Each serving provides 100 mg of L-Theanine at a high cost for the amount supplied. No branded source or added purity claim is recorded. The amount and form are clearly stated.
How this ingredient is rated
Active Ingredient Quality & Bioavailability80
The form is L-Theanine, the active isomer. No branded source or added purity claim is recorded.
Isomer Specificity (L-Theanine)
The label specifies L-Theanine, the active isomer.
Branded Forms & Purity Standards
No branded source or added purity claim is recorded.
Dose, Safety & Label Transparency100
The serving supplies 100 mg, a substantial amount, and its amount and source are stated.
Theanine Dosage Efficacy
The serving provides 100 mg of theanine, a substantial amount.
Label Transparency & Blends
The theanine amount and source are individually disclosed.
Value20
The cost is high for the amount of theanine, based on the full serving price.
Price per 100mg L-Theanine
The cost is high for the amount of theanine, based on the full serving price.
GABA · 100 mg OverallScore84
A serving provides 100 mg GABA at a relatively high cost. It uses PharmaGABA, a fermented form. No listed ingredients matched the specified additive or flow-agent terms.
How this ingredient is rated
Active Ingredient Quality & Bioavailability100
The GABA is PharmaGABA, a fermented form.
GABA Source & Production Method
The GABA is PharmaGABA, a fermented form.
Dose, Safety & Label Transparency90
The serving states 100 mg GABA. No listed ingredients matched the specified additive or flow-agent terms.
GABA Dosage Adequacy & Transparency
The GABA amount is 100 mg per serving.
Label Purity & Excipient Quality
No listed ingredients matched the specified additive or flow-agent terms.
Value40
The cost per serving is relatively high for this GABA form.
Price per Effective Dose
The cost per serving is relatively high for this GABA form.
Magnesium (Magnesium Citrate) · 300 mg OverallScore62
A serving provides 300 mg magnesium at a high whole-product cost per serving. It uses magnesium citrate. The label does not specify a fully chelated claim.
How this ingredient is rated
Active Ingredient Quality & Bioavailability49
It uses magnesium citrate. No fully chelated claim or named magnesium chelation material is specified.
Magnesium Form & Absorption Potential
It uses magnesium citrate.
Patented Materials & Chelation Quality
No fully chelated claim or named magnesium chelation material is specified.
Dose, Safety & Label Transparency90
Each serving provides 300 mg elemental magnesium. No vitamin B6, vitamin D or boron contribution is recorded.
Elemental Yield Transparency
The elemental magnesium amount and source are stated.
Therapeutic Dosage Alignment
Each serving provides 300 mg elemental magnesium.
Synergistic Formulation Logic
No vitamin B6, vitamin D or boron contribution is recorded.
Value30
The whole-product cost per serving is high for the stated magnesium forms.
Price Per Elemental Quality
The whole-product cost per serving is high for the stated magnesium forms.
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Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- Association between Serum Magnesium and Fractures: A Systematic Review and Meta-Analysis of Observational Studies.
- Bioabsorbable Magnesium-Based Materials Potential and Safety in Bone Surgery: A Systematic Review.
- Vascularized bone grafting fixed by biodegradable magnesium screw for treating osteonecrosis of the femoral head.
- An update on magnesium and bone health.
- Sex-specific differences in the association of magnesium intake with femoral neck bone mineral density among older adults.
- Antenatal magnesium sulfate and neuroprotection.
- No. 376-Magnesium Sulphate for Fetal Neuroprotection.
- Magnesium Sulfate Before Preterm Birth for Neuroprotection: An Updated Cochrane Systematic Review.
- Magnesium sulphate for fetal neuroprotection at imminent risk for preterm delivery: a systematic review with meta-analysis and trial sequential analysis.
- Magnesium sulfate and fetal neuroprotection: overview of clinical evidence.
- Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial.
- A Randomized, Triple-Blind, Placebo-Controlled, Crossover Study to Investigate the Efficacy of a Single Dose of AlphaWave® L-Theanine on Stress in a Healthy Adult Population.
- Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
- Assessing the effects of caffeine and theanine on the maintenance of vigilance during a sustained attention task.
- Effects of l-Theanine on Cognitive Function in Middle-Aged and Older Subjects: A Randomized Placebo-Controlled Study.
- Circulating and dietary magnesium and risk of cardiovascular disease: a systematic review and meta-analysis of prospective studies.
- Magnesium and the risk of cardiovascular events: a meta-analysis of prospective cohort studies.
- Quantitative Association Between Serum/Dietary Magnesium and Cardiovascular Disease/Coronary Heart Disease Risk: A Dose-Response Meta-analysis of Prospective Cohort Studies.
- Comparative Efficacy of Nutraceuticals on Endothelial Function: A Systematic Review and Network Meta-Analysis.
- Serum magnesium, mortality, and cardiovascular disease in chronic kidney disease and end-stage renal disease patients: a systematic review and meta-analysis.