PlainVitamins

non-nutrient/non-botanical

Theanine supplements

Half of the 1,602 theanine supplements in the NIH label database that print an amount list 100 mg or less per serving; the middle half list 90 mg to 200 mg (DSLD version 9.4.0, January 2026). The 134 products whose only supplement ingredient is theanine list a median of 200 mg.

Products listing it
2,1331,602 print an amount; 530 list it inside a blend without an amount
Median per serving
100 mgmiddle half 90 mg to 200 mg

How much theanine do supplements contain?

The median product lists 100 mg per serving. One in ten lists 50 mg or less, one in ten 248 mg or more. The amount printed most often is 200 mg (463 products).

Products by amount of theanine per serving

1,602 products, log scale; extreme 0.2% at each end left out of the drawing.

Theanine: products by amount per serving10 mg30 mg100 mg300 mg
Theanine: products by amount per serving10 mg30 mg100 mg300 mg
Theanine: products by amount per serving10 mg30 mg100 mg300 mg
Theanine: products by amount per serving10 mg30 mg100 mg300 mg
Theanine: products by amount per serving10 mg30 mg100 mg300 mg
The amounts printed most often
Amount per servingProductsFor example
200 mg463 Theanine Calm Caps (Vitamin World); PureBalance Serotonin With 5-HTP, Relora, L-Theanine & Rhodiola (Quality Of Life Labs); WomenSense MoodFood Suntheanine & Whey Protein (Natural Factors)
100 mg422 Relora Serene (R-Garden); Om (Highland Laboratories); Energy Natural Citrus Burst (Shaklee)
50 mg213 Beauty Sleep (ResVitale); Natra Sleep (GNC Herbal Plus Formula); Sleep Soundly Advanced (GNC Preventive Nutrition)
150 mg69 Theanine (Natrol); Sleep Support (Pathway To Healing); Neurocore Blue Raspberry (MuscleTech Concentrated Series)
300 mg52 Pre-Workout Complex Blue Raspberry (Nutricost); Pre-Workout For Women Strawberry (Nutricost); Pre Extreme Unflavored (NutraBio)
25 mg51 Relaxation Support (Vitabase); Rockstar Relax Tropical Guava Flavor (Rockstar); MoodBoost (LES Labs)
75 mg37 Anarchy Watermelon (MuscleTech Performance Series); Anarchy Blue Raspberry (MuscleTech Performance Series); Kids Daily B-Centered (MegaFood)
250 mg34 L-Theanine (PureBulk.com); Sleep N Burn Cmplx (Faktrition); Suntheanine L-Theanine 125 mg (Natural Factors Stress-Relax)
400 mg34 L-Theanine 400 mg (OL Olympian Labs); Sleep Well (Healthy Choice Naturals); Alphagen Gummy Candy (Morphogen Nutrition)
90 mg25 NitroSurge Pre-Workout Blue Raspberry (Jacked Factory); Nitrosurge Blue Raspberry (Jacked Factory); Nitrosurge Black Lemon Lime (Jacked Factory JF)

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

Which products list the most theanine?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

Have the amounts changed over the years?

Products whose current label entered DSLD in 2012 list a median of 100 mg; those entered in 2025, 150 mg.

Median theanine per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
201226100 mg
201343100 mg
201425100 mg
20154062.5 mg
201637100 mg
201767150 mg
201853100 mg
201961100 mg
2020171100 mg
2021161100 mg
2022204100 mg
2023192100 mg
2024267150 mg
2025241150 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing theanine by DSLD product type

Theanine by product typeOther Combinations1,367Non-Nutrient/Non-Botanical180Botanical with Nutrients23Amino acid/Protein18Botanical14
Theanine by product typeOther Combinations1,367Non-Nutrient/Non-Botanical180Botanical with Nutrients23Amino acid/Protein18Botanical14
Theanine by product typeOther Combinations1,367Non-Nutrient/Non-Botanical180Botanical with Nutrients23Amino acid/Protein18Botanical14
Theanine by product typeOther Combinations1,367Non-Nutrient/Non-Botanical180Botanical with Nutrients23Amino acid/Protein18Botanical14
Theanine by product typeOther Combinations1,367Non-Nutrient/Non-Botanical180Botanical with Nutrients23Amino acid/Protein18Botanical14

Brands listing it most: PS ProSupps (34), Jacked Factory (23), NutraBio (22), Alani Nu (22), OLLY (21), MuscleTech Performance Series (20), Natrol (18), Irwin Naturals (18), LifeSeasons (16), Jacked Factory JF (16).

Every product listing theanine

2,133 products, A to Z by name (page 22 of 43), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

Where next?