L-Theanine

product on market Capsule Higher Nature 🟢 Safety: 100/100
Brand: Higher Nature
🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

1 Capsule(s) Serving Size
28 Servings
Non-Nutrient/Non-Botanical Product Type
100% Evidence Coverage

Supplement Facts — Evidence Check

100 mg
📊 Market median: 200.0mg (358 products) 📚 9 studies (Tier A: 0, B: 2)
This product: 100mg

Other Ingredients

L-Theanine Capsule Microcrystalline Cellulose Silicon Dioxide Magnesium Stearate

Label Claims — Verification

❓ Nutrient
❓ All Other
❓ Structure/Function
All Other (99% of products) Structure/Function (92% of products) Nutrient (22% of products)

Target Groups

Vegan Vegetarian Adult (18 - 50 Years) Women (not pregnant or lactating) Gluten Free Dairy Free

Product Information

📋 Directions for Use

Directions: Take 1 strip (containing 3 different capsules) daily 45 minutes before bed.

⚠️ Warnings & Precautions

Do not exceed recommended daily intake. Food supplements should not be used as a substitute for a varied and balanced diet and healthy lifestyle.

Storage: Store in a cool, dry place out of reach of children.

Warning: Consult your doctor if under medical supervision or taking prescribed medications. Not advisable if pregnant, breastfeeding or if taking antidepressants.

Can cause drowsiness; do not drive or operate machinery if affected.

🧪 Formulation Notes

Includes one each of High Strength Magnesium, L-Theanine and 5-HTP Complex. The perfect combination of nutrients to support a restful night and help you wake up feeling refreshed 5-HTP and l-theanine for targeted support

A trio of supplements in a handy daily strip to help you have a relaxed and restful night

Vegetarian & vegan

Free from: Artificial colours, flavourings or preservatives, dairy products, gluten, lactose, salt, soya, sugar, wheat, yeast.

Additional Information

NRV = Nutrient Reference Value

Storage: Store in a cool, dry place out of reach of children.

Also try daily nutrients for... Calm Energy & vitality Immunity Vegans

Blister strips not to be sold separately

This product has not been tested on animals.

Product Details

UPC / SKU 5 031013 108761
DSLD Entry Date 2021-04-22
Product Type Non-Nutrient/Non-Botanical
Form Capsule
Brand Higher Nature
Bundle Daily Nutrients for a Restful Night
DSLD ID 246112
Data Updated 2026-04-11

Research Evidence

37 Research Sources
53 Avg Quality Score
22 Rct
10 Systematic Review
3 Meta Analysis
1 Clinical Trial
1 Openfda Safety
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
Rct Nutritional neuroscience 2010
PubMed DOI
B Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial
Rct Nutrients 2019
PubMed DOI
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
Rct Nutrients 2022
PubMed DOI
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
Rct Nutritional neuroscience 2025
PubMed DOI
B The combined effects of L-theanine and caffeine on cognitive performance and mood
Rct Nutritional neuroscience 2008
PubMed DOI
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 →

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