$16.99 $0.48 per serving
Product analysis
Sleep Blackberry Zen combines melatonin for sleep timing and falling asleep with theanine for possible relaxation. Unspecified ingredient forms make the preparations harder to compare.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality20
Ingredient preparations are unspecified throughout. That limits comparisons of the melatonin, theanine and accompanying herbs.
Ingredient Transparency63
All listed amounts are disclosed. Forms are omitted, so quantities are easier to compare than the preparations themselves.
Value For Money41
Theanine offers middling value, while melatonin compares poorly on cost. The other ingredients lack dependable cost comparisons.
Customer Satisfaction83
Customer ratings are generally favorable. A large review pool makes the satisfaction pattern more established without proving sleep benefits.
Product Focus61
Melatonin gives the formula its clearest role in sleep timing. The smaller theanine amount offers more limited relaxation support, while melatonin-related sleepiness can interfere with daytime attention.
- Format
Gummy - Container
- 70 Gummy(ies)
- Per serving
- $0.48
- Also available
Extra Strength Sleep Blackberry Zen$12.79- Customer rating
- 4.4 · 7,157 ratings
Goals
Impact
Highest effect
Melatonin · 3 mgTheanine · 100 mg
Impact
High effect
Theanine · 100 mg
Impact
Lower effect
Theanine · 100 mg
Impact
High effect
Impact
Moderate effect
Impact
Moderate effect
Theanine · 100 mg
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Calories | 15 Calorie(s) | |
Total Carbohydrates | 3 Gram(s) | |
Protein | 1 Gram(s) | |
L-Theanine | 100 mg | |
Melatonin | 3 mg | |
Chamomile extract | 17 mg | |
Passionflower extract | 17 mg | |
Lemon Balm extract | 16 mg |
Theanine · 100 mg OverallScore82
Each serving provides 100 mg of L-Theanine, with a relatively high cost for the amount. No branded source or purity claim is specified.
How this ingredient is rated
Active Ingredient Quality & Bioavailability80
The ingredient is specified as L-Theanine. No branded source or purity claim is specified.
Isomer Specificity (L-Theanine)
The ingredient is specified as L-Theanine.
Branded Forms & Purity Standards
No branded source or purity claim is specified.
Dose, Safety & Label Transparency100
The label gives an individual amount of 100 mg per serving.
Theanine Dosage Efficacy
Each serving provides 100 mg of L-Theanine.
Label Transparency & Blends
The individual theanine amount is disclosed.
Value50
The cost for the amount of theanine is relatively high.
Price per 100mg L-Theanine
The cost for the amount of theanine is relatively high.
Melatonin · 3 mg OverallScore70
The serving contains 3 mg of melatonin. The cost per serving is high. A third-party certification or testing claim is stated.
How this ingredient is rated
Active Ingredient Quality & Bioavailability60
A third-party certification or testing claim is stated.
Third-Party Purity Verification
A third-party certification or testing claim is stated.
Dose, Safety & Label Transparency100
The serving contains 3 mg of melatonin.
Physiological Dosing Alignment
The serving contains 3 mg of melatonin.
Value30
The cost per serving is high.
Price Per Serving Efficiency
The cost per serving is high.
Alternative products
Report alternatives
Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- Comparative Efficacy, Tolerability, and Acceptability of Donanemab, Lecanemab, Aducanumab, Melatonin, and Aerobic Exercise for a Short Time on Cognitive Function in Mild Cognitive Impairment and Mild Alzheimer's Disease: A Systematic Review and Network Meta-Analysis.
- Melatonin for sleep and cognitive outcomes in older adults with cognitive impairment: a meta-analysis of randomised controlled trials.
- Add-on prolonged-release melatonin for cognitive function and sleep in mild to moderate Alzheimer's disease: a 6-month, randomized, placebo-controlled, multicenter trial.
- Early Oral Melatonin Supplementation Supports White Matter Maturation in Preterm Infants: Neuroprotective Insights of an Antioxidant Molecule.
- Efficacy and Safety of Melatonin in Migraine Prophylaxis: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
- 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.
- Dose-response effect of L-theanine on psychomotor speed, sustained attention, and inhibitory control: a double-blind, placebo-controlled, crossover study.
- Acute effects of theanine, caffeine and theanine-caffeine combination on attention.
- l-theanine adjunct to sertraline for major depressive disorder: A randomized, double-blind, placebo-controlled clinical trial.
- L-theanine relieves positive, activation, and anxiety symptoms in patients with schizophrenia and schizoaffective disorder: an 8-week, randomized, double-blind, placebo-controlled, 2-center study.
- The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review.
- Comparison of the effects of two amino acids, Gamma-aminobutyric acid (GABA) and L-theanine, on sedation, anxiety, and cognition in preoperative surgical patients - A randomized controlled study.
- Anti-stress effect of theanine on students during pharmacy practice: positive correlation among salivary α-amylase activity, trait anxiety and subjective stress.
- Cognitive and affective effects of L-Theanine: a systematic review and meta-analysis of 31 randomized trials.
- Safety and Efficacy of AlphaWave® L-Theanine Supplementation for 28 Days in Healthy Adults with Moderate Stress: A Randomized, Double-Blind, Placebo-Controlled Trial.
- Effects of L-theanine on cognition, mood and sleep: evidence from human trials.