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PlainVitamins

Amino acid · Supplement ingredient

Theanine

Theanine is listed on 1,205 U.S. supplement product labels in the NIH DSLD, #183 of 4,614 by label frequency.

1,205
Products
#183 of 4,614
By frequency
Verify with NIH DSLD → · FDA Daily Value reference → · Page 5 of 25

How common is Theanine?

Number of supplement labels listing Theanine vs nearby amino acid ingredients

products
Source NIH Dietary Supplement Label Database (DSLD) As of 2026

Products containing Theanine

Kid's B Complex
MegaFood
24 ingredients · Other Combinations
On Market
Kids Cool & Calm Grape Flavored
Nature's Way
20 ingredients · Other Combinations
On Market
Kids Sleep Tight Raspberry Flavored
Orgain
26 ingredients · Other Combinations
On Market
Kill It Reloaded Blue Raspberry
Rich Piana 5% Nutrition
31 ingredients · Other Combinations
On Market
Kill It Reloaded Cosmic Candy
Rich Piana 5% Nutrition
31 ingredients · Other Combinations
On Market
Kill It Reloaded Fruit Punch
Rich Piana 5% Nutrition
30 ingredients · Other Combinations
On Market
Kyolic Formula 109
Kyolic
7 ingredients · Other Combinations
On Market
Kyolic Nattokinase, Suntheanine Formula 109
Kyolic
7 ingredients · Other Combinations
On Market
L Theanine 200 mg
Advance Physician Formulas
3 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine & Caffeine
Nutriana
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine & Caffeine
SR Sports Research
12 ingredients · Other Combinations
On Market
L-Theanine (500 mg)
BulkSupplements.com
3 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine (500 mg)
BulkSupplements.com
3 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine (500 mg)
BulkSupplements.com
2 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine (500 mg)
BulkSupplements.com
2 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine (Double Strength)
Herbadiet
2 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine + Caffeine
Sports Research
12 ingredients · Other Combinations
On Market
L-Theanine 100 mg
Newflower Farmers Markets
6 ingredients · Amino acid/Protein
On Market
L-Theanine 100 mg
The Vitamin Shoppe
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 100 mg
Exchange Select
8 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 100 mg
CHK Nutrition
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 100 mg
Seeking Health
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 100 mg
Healthy Origins
4 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 100 mg
Healthy Origins
4 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 100 mg
Lake Avenue Nutrition
5 ingredients · Amino acid/Protein
On Market
L-Theanine 100 mg
California Gold Nutrition
4 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 100 mg
Meijer
6 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 100 mg
California Gold Nutrition
4 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 100 mg
Life Extension
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 100 mg Mint Flavored
Country Life
15 ingredients · Other Combinations
On Market
L-Theanine 150 mg
BIOVEA
4 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 150 mg
Doctor's Best
4 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Vitamin World
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Vitamer Laboratories
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
VitaCeutical Labs
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Hard Rhino
5 ingredients · Amino acid/Protein
On Market
L-Theanine 200 mg
Double Wood Supplements
3 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
GNC
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Lamberts Healthcare
6 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
AN Amazing Nutrition Amazing Formulas
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Woodstock Vitamins
4 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Nutralife
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
SportsResearch
6 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Health Thru Nutrition
5 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
SR Sports Research
6 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Nutricost
3 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Best Naturals
8 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Advance Physician Formulas
2 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
Metabolic Maintenance
2 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Theanine 200 mg
California Gold Nutrition
4 ingredients · Non-Nutrient/Non-Botanical
On Market

Nearby Ingredients in Amino acid

Other ingredients in the Amino acid category cataloged in the NIH DSLD. Useful for comparing how common different nutrients are across the US supplement market.

Compare Theanine vs Leucine →

Leucine
4,582 products · Amino acid
Glutamine
2,515 products · Amino acid
Valine
1,971 products · Amino acid
Isoleucine
1,946 products · Amino acid
Tyrosine
1,744 products · Amino acid

Nationwide ingredients with similar DSLD presence

Two peer sets for Theanine: closest on total DSLD label listings (1,205 here) and closest on distinct brands that list it (489 here). Peers exclude the same DSLD category, and rows stay link-disjoint so each axis is a distinct neighborhood.

Similar label frequency

Nearest other ingredients by distinct DSLD product labels (floored at ≥50), outside this category.

Similar brand breadth

Nearest other ingredients by distinct brands listing them (floored at ≥100 brands), distinct from the label-frequency row.

Frequently asked about Theanine

How many supplement products contain Theanine? ▼
1,205 supplement product labels in the NIH DSLD currently lists Theanine as an ingredient. By label frequency it ranks #183 of 4,614 among ingredients PlainVitamins ranks (same sort as /rankings/most-common-ingredients). Browse them below.

Source: NIH Office of Dietary Supplements, Dietary Supplement Label Database (DSLD). Regulatory reference: Source: Dietary Supplement Health and Education Act (DSHEA), 1994, 21 U.S.C. § 321(ff).

Disclaimer, Not Medical Advice: Information on this page is based on manufacturer-declared label data and is provided for educational and reference purposes only. It does not constitute medical, nutritional, or health advice. Consult a licensed healthcare provider before starting, stopping, or combining any supplement, especially if you are pregnant, nursing, take prescription medication, or have a medical condition.

Read our methodology , how this data is sourced, computed, and verified.

Every figure on PlainVitamins is rendered directly from the NIH Dietary Supplement Label Database (DSLD), no number is typed in by an editor. Ingredient figures are computed directly from the NIH DSLD, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.