100/100
This product looks safe
- No ingredients exceed tolerable upper intake levels
- 67% of ingredients have research evidence
A
Label Compliance Grade
What the Evidence Says
✨ AI-generated · Qwen 3.6
· methodology
GABA and L-theanine are supported by moderate evidence for their roles in promoting relaxation and reducing stress. Phosphatidylcholine is utilized here as a liposomal delivery system to enhance absorption. Research indicates these ingredients are generally well-tolerated and safe for most users.
AI-generated summary based on research evidence. Not medical advice.
Details
Label Data
Other Combinations
Product Type
Ingredients
Supplement Facts — Evidence Check
Market median: 200.0mg (358 products)
9 studies (A:0, B:2)
Within RDA (0.2× RDA)
38 studies (A:1, B:7)
Other Ingredients
Water
Glycerin
Ethanol
Vitamin E
Claims
Label Claims — Verification
Unverified
All Other
Unverified
Structure/Function
Info
Product Information
Directions for Use
Suggested Use: Take 2-4 pumps by mouth as needed. Hold in mouth 30 seconds before swallowing. Repeat to desired dosage or as directed by a healthcare professional. Take on an empty stomach, at least 10 minutes before meals.
Warnings & Precautions
If pregnant, consult physician before use.
Formulation Notes
Quicksilver Delivery Systems: Our nutraceuticals utilize modern science to unleash the power of nature. Our advanced phospholipid delivery systems nourish your cells as they deliver their core ingredients faster and more effectively than conventional supplement formats.
Immediate effect - superior delivery
Additional Information
Store at room temperature.
Quicksilver Delivery Systems
Powering natural health
Metadata
Product Details
UPC / SKU6 53341 62000 2
DSLD Entry Date2020-05-22
Product TypeOther Combinations
FormLiquid
Data Updated2026-04-11
Research
Research Evidence
B
Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials
Systematic Review
Nutritional neuroscience
2026
PubMed
DOI
B
The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis
Meta Analysis
Sleep medicine reviews
2025
PubMed
DOI
B
The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness
B
Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial
B
The Role of Supplements and Over-the-Counter Products to Improve Sleep in Children: A Systematic Review
Systematic Review
International journal of molecular sciences
2023
PubMed
DOI
B
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
Meta Analysis
Nutrition reviews
2025
PubMed
DOI
B
Effect of Alpha-S1-Casein Tryptic Hydrolysate and L-Theanine on Poor Sleep Quality: A Double Blind, Randomized Placebo-Controlled Crossover Trial
B
Effect of L-theanine on selective attention in a traffic-related reaction task in sleep-deprived young adults: a double-blind placebo-controlled, crossover study
B
The combined effects of L-theanine and caffeine on cognitive performance and mood
B
Acute effects of tea constituents L-theanine, caffeine, and epigallocatechin gallate on cognitive function and mood: a systematic review and meta-analysis
Meta Analysis
Nutrition reviews
2014
PubMed
DOI
View all evidence for L Theanine →
This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.
