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Suntheanine L-Theanine

non-nutrient/non-botanical

49
products
Updated April 2026

Dosage Range

15 mgavg 148.06 mg250 mg

Suntheanine L-Theanine is found in 114 supplement products from 35 brands. Dosages range from 15 to 250 mg, with an average of 148.06. The most common form is Capsule.

Top 5 Highest-Dosage Suntheanine L-Theanine Supplements

  1. Suntheanine L-Theanine 125 mg by Natural Factors Stress-Relax — 250 mg
  2. Zen Theanine by AOR Advanced Orthomolecular Research Premium — 225 mg
  3. Probiotic Solutions Stress by GNC Probiotic Solutions — 200 mg
  4. Advanced Stress Support by The Vitamin Shoppe — 200 mg
  5. Tranquil Sleep by Natural Factors Stress-Relax — 200 mg

Suntheanine L-Theanine 125 mg by Natural Factors Stress-Relax has the highest Suntheanine L-Theanine dosage at 250 mg. Relaxation Formula by GNC has the lowest at 50 mg.

All Products

showing 49 of 49
Suntheanine L-Theanine 125 mg
● OTHER INGREDIENTS (2)
Natural Factors Stress-Relax
250 mg— DVCapsule
Zen TheanineAOR Advanced Orthomolecular Research Premium
225 mg— DVCapsule
Probiotic Solutions Stress
● OTHER INGREDIENTS (3)
GNC Probiotic Solutions
200 mg— DVCapsule
Advanced Stress Support
● OTHER INGREDIENTS (2)
The Vitamin Shoppe
200 mg— DVCapsule
Tranquil Sleep
● OTHER INGREDIENTS (2)
Natural Factors Stress-Relax
200 mg— DVTablet or Pill
L-Theanine 200 mg
● OTHER INGREDIENTS (2)
GNC
200 mg— DVCapsule
Stress Support
● OTHER INGREDIENTS (4)
GNC Preventive Nutrition
200 mg— DVOther (e.g. tea bag)
Reset & Relax
● OTHER INGREDIENTS (2)
MyTrition
200 mg— DVCapsule
L-Theanine 200 mg Double Strength
● OTHER INGREDIENTS (1)
Swanson
200 mg— DVCapsule
WomenSense MoodFood Suntheanine & Whey Protein
● OTHER INGREDIENTS (1)
Natural Factors
200 mg— DVPowder
Extra Strength Tranquil Sleep
● OTHER INGREDIENTS (2)
Natural Factors Stress-Relax
200 mg— DVTablet or Pill
Suntheanine L-Theanine 100 mg
● OTHER INGREDIENTS (2)
Natural Factors Stress-Relax
200 mg— DVTablet or Pill
Theanine
● OTHER INGREDIENTS (2)
Natrol
150 mg— DVTablet or Pill
Suntheanine L-Theanine 150 mgDoctor's Best
150 mg— DVCapsule
Sambucus PMNature's Answer
100 mg— DVLiquid
StressAssist
● OTHER INGREDIENTS (1)
Futurebiotics
100 mg— DVCapsule
Diet Detox
● OTHER INGREDIENTS (4)
GNC BodyDynamix
100 mg— DVOther (e.g. tea bag)
Sleep Solution (Single Dose Liquid) Raspberry-Lemonade FlavorPure Encapsulations
100 mg— DVLiquid
System Detox & Metabolic Support Blend
● OTHER INGREDIENTS (4)
GNC Total Lean Advanced
100 mg— DVTablet or Pill
Liposomal Zen
● OTHER INGREDIENTS (1)
Allergy Research Group
100 mg— DVLiquid
NootropicGNC Beyond Raw Chemistry Labs
100 mg— DVPowder
Brain Support1 Body
100 mg— DVCapsule
Natra SleepGNC Herbal Plus Formula
50 mg— DVCapsule
Sleep Soundly Advanced
● OTHER INGREDIENTS (1)
GNC Preventive Nutrition
50 mg— DVOther (e.g. tea bag)
Natra SleepGNC Herbal Plus
50 mg— DVCapsule
Super Antioxidant Stress & Beauty Complex
● OTHER INGREDIENTS (2)
GNC Women's Ultra Mega
50 mg— DVOther (e.g. tea bag)
Maxi-Skin Zen With L-Theanine Mandarin Chamomile Flavor
● OTHER INGREDIENTS (1)
Country Life
30 mg— DVPowder
MoodBoost
● OTHER INGREDIENTS (2)
LES Labs
25 mg— DVCapsule
SlimStyles Green Tea Thermogenic Formula
● OTHER INGREDIENTS (2)
Natural Factors
15 mg— DVCapsule
Suntheanine L-TheanineDiscontinued
● OTHER INGREDIENTS (2)
Natural Factors Stress-Relax
200 mg— DVTablet or Pill
SuntheanineDiscontinued
● OTHER INGREDIENTS (2)
Natural Factors Stress-Relax
200 mg— DVTablet or Pill
Double Strength L-Theanine 200 mg SuntheanineDiscontinued
● OTHER INGREDIENTS (2)
NOW
200 mg— DVCapsule
Tranquil Sleep Extra StrengthDiscontinued
● OTHER INGREDIENTS (2)
Natural Factors Stress-Relax
200 mg— DVTablet or Pill
Tranquil Sleep Advanced Fast Acting Formula 5-HTP, Suntheanine & MelatoninDiscontinued
● OTHER INGREDIENTS (2)
Natural Factors Stress-Relax
200 mg— DVTablet or Pill
Double Potency Suntheanine L-Theanine 200 mgDiscontinued
● OTHER INGREDIENTS (2)
Swanson Ultra
200 mg— DVCapsule
Suntheanine L-TheanineDiscontinued
● OTHER INGREDIENTS (1)
Natural Factors
200 mg— DVTablet or Pill
Sleep HealthDiscontinuedEmerald Laboratories
150 mg— DVCapsule
L-Theanine 150 mgDiscontinued
● OTHER INGREDIENTS (2)
Solgar
150 mg— DVCapsule
Sleep HealthDiscontinuedEmerald
150 mg— DVCapsule
Stress Shield NighttimeDiscontinued
● OTHER INGREDIENTS (2)
Country Life
150 mg— DVCapsule
Ultimate Stress PillsDiscontinued
● OTHER INGREDIENTS (1)
Lee Swanson Signature Line
133.33 mg— DVCapsule
Sleep Solution Natural Raspberry-Lemonade FlavorDiscontinuedPure Encapsulations
100 mg— DVLiquid
Sleep FormulaDiscontinued
● OTHER INGREDIENTS (1)
Swanson Ultra
100 mg— DVCapsule
Calming TonIQ Lemon Cucumber MintDiscontinuedGNC Earth Genius
100 mg— DVPowder
L-Theanine 100 mg Smooth MeltsDiscontinued
● OTHER INGREDIENTS (1)
Country Life
100 mg— DVOther (e.g. tea bag)
CALM Sleep Mixed Berry FlavorDiscontinuedNatural Vitality
50 mg— DVPowder
Natural CALM Specifics Calmful Sleep Wildberry FlavorDiscontinuedNatural Vitality
50 mg— DVLiquid
CALM Kids Mixed Berry FlavorDiscontinuedNatural Vitality
50 mg— DVPowder
Relaxation FormulaDiscontinued
● OTHER INGREDIENTS (1)
GNC
50 mg— DVOther (e.g. tea bag)

Frequently Asked Questions

How many products contain Suntheanine L-Theanine?

There are 114 supplement products containing Suntheanine L-Theanine from 35 brands in the NIH DSLD database.

What is the average Suntheanine L-Theanine dosage?

The average Suntheanine L-Theanine dosage across supplement products is 148.06 mg. Dosages range from 15 to 250 mg.

What is the most common form for Suntheanine L-Theanine supplements?

The most common product form for Suntheanine L-Theanine supplements is Capsule.

What brands make Suntheanine L-Theanine supplements?

There are 35 brands that make supplements containing Suntheanine L-Theanine in the NIH DSLD database.

Related Ingredients

Inositol7,467Lutein3,954Lycopene3,130Coenzyme Q102,898Alpha Lipoic Acid2,496PABA2,209Rutin2,169Taurine2,137

Explore More

Quick Facts

Products
114
Brands
35
Avg Dose
148.06 mg
Common Form
Capsule
Category
non-nutrient/non-botanical

Related Ingredients

Inositol7,467Lutein3,954Lycopene3,130Coenzyme Q102,898Alpha Lipoic Acid2,496