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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

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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
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
StressAssist
● OTHER INGREDIENTS (1)
Futurebiotics
100 mg— DVCapsule
Diet Detox
● OTHER INGREDIENTS (4)
GNC BodyDynamix
100 mg— DVOther (e.g. tea bag)
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
Sleep Soundly Advanced
● OTHER INGREDIENTS (1)
GNC Preventive Nutrition
50 mg— DVOther (e.g. tea bag)
Super Antioxidant Stress & Beauty Complex
● OTHER INGREDIENTS (2)
GNC Women's Ultra Mega
50 mg— DVOther (e.g. tea bag)
MoodBoost
● OTHER INGREDIENTS (2)
LES Labs
25 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
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 FormulaDiscontinued
● OTHER INGREDIENTS (1)
Swanson Ultra
100 mg— DVCapsule
L-Theanine 100 mg Smooth MeltsDiscontinued
● OTHER INGREDIENTS (1)
Country Life
100 mg— DVOther (e.g. tea bag)
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.

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Quick Facts

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