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Theanine Complex

product on market Capsule BIOVEA Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 50% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

L-theanine, GABA, and magnesium are supported by moderate evidence for promoting relaxation and reducing stress. Taurine and magnolia extract also contribute to calming effects, though overall evidence coverage for this specific combination is limited. The profile maintains a high safety score.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Theanine Complex
Open Full PDF View on NIH DSLD →
Details

Label Data

4 Vegetarian Capsule(s)
Serving Size
30
Servings
Other Combinations
Product Type
50%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

300 mg (71% DV)
Within RDA (0.7× RDA) 316 studies (A:8, B:159)
GABA
500 mg
450 mg
Market median: 500.0mg (180 products) 5 studies (A:0, B:1)
200 mg
Market median: 200.0mg (358 products) 9 studies (A:0, B:2)
Magnolia extract
60 mg
Market median: 500.0mg (138 products) 2 studies — no high-quality reviews

Other Ingredients

Hydroxypropyl Methylcellulose Vegetable Magnesium Stearate Silicon Dioxide
Claims

Label Claims — Verification

Unverified All Other
Info

Product Information

Directions for Use

Suggested Daily Intake: Take 4 capsules daily.

Warnings & Precautions

Warning: If you are pregnant, may become pregnant, or breastfeeding, or taking any medication including anti-depressant drugs such as MAOIs, SSRIs, or other neuropsychiatric drugs or supplements such as St. John's wort, consult your health care professional before using this product.

Excessive consumption may impair ability to drive or operate heavy equipment. Not recommended for consumption with alcoholic beverages.

Keep out of reach of children.

Do not use this product if the safety seal on the bottle is broken.

Formulation Notes

VG Vegan

Gluten free Non-GMO

Additional Information

GMP Compliant VG Vegan Gluten free Non-GMO

Premium quality guaranteed since 2001. BIOVEA is committed to product quality to support you and your family's wellness goals. Because we feel so strongly about the quality, potency and purity of our products, we 100% guarantee your satisfaction with every purchase.

Store in a cool, dry place.

Guaranteed premium quality

Relaxation

Metadata

Product Details

UPC / SKU8 18423 02422 6
DSLD Entry Date2019-10-23
Product TypeOther Combinations
FormCapsule
BrandBIOVEA
DSLD ID208527
Data Updated2026-04-11
Research

Research Evidence

37
Research Sources
53
Avg Quality
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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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.