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Other · Supplement ingredient

capsule

capsule is listed on 14,234 U.S. supplement product labels in the NIH DSLD, #15 of 4,614 by label frequency.

14,234
Products
#15 of 4,614
By frequency
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How common is capsule?

Number of supplement labels listing capsule vs nearby other ingredients

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

Products containing capsule

L-MethylFolate
ProThera
5 ingredients · Vitamin
Off Market
L-MethylFolate
Klaire Labs
5 ingredients · Vitamin
Off Market
L-MethylFolate
Klaire Labs
6 ingredients · Vitamin
Off Market
L-MethylFolate
Klaire Labs
7 ingredients · Vitamin
Off Market
L-OptiZinc 30 mg
NOW
5 ingredients · Mineral
Off Market
L-OptiZinc 30 mg
NOW
5 ingredients · Mineral
Off Market
L-Ornithine 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Ornithine 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Ornithine 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Ornithine 500 mg
Bluebonnet
5 ingredients · Amino acid/Protein
Off Market
L-Ornithine 500 mg
Nutricost
5 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
NOW
2 ingredients · Amino acid/Protein
Off Market
L-Phenylalanine 500 mg
BIOVEA
5 ingredients · Amino acid/Protein
Off Market
L-Proline 500 mg
Physician's Preference
4 ingredients · Amino acid/Protein
Off Market
L-Proline 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Taurine 1000 mg
Kirkman
3 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Taurine 325 mg
Kirkman
2 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 100 mg
NOW
6 ingredients · Botanical with Nutrients
Off Market
L-Theanine 100 mg Suntheanine
NOW
6 ingredients · Other Combinations
Off Market
L-Theanine 100 mg Suntheanine
NOW
6 ingredients · Botanical with Nutrients
Off Market
L-Theanine 150 mg
BIOVEA
4 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 150 mg
Bluebonnet
4 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 150 mg
Bluebonnet
4 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 200 mg
Vital Nutrients
3 ingredients · Amino acid/Protein
Off Market
L-Theanine 200 mg
Protocol For Life Balance
5 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 200 mg
Vital Nutrients
3 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 200 mg
Protocol For Life Balance
5 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 200 mg
Protocol For Life Balance
5 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 200 mg
NutraBio
2 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 200 mg
Nature's Way
4 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 200 mg
Nature's Way
4 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 200 mg
NutraBio
2 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 200 mg
Nature's Way
4 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 200 mg
Nature's Way
4 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Theanine 400 mg
OL Olympian Labs
6 ingredients · Non-Nutrient/Non-Botanical
Off Market
L-Tryptophan 1000 mg
NOW
7 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
California Academy of Health
4 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
Jarrow Formulas
5 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
Protocol For Life Balance
4 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
Protocol For Life Balance
4 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
Protocol For Life Balance
4 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
Protocol For Life Balance
4 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
Protocol For Life Balance
4 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
NOW
4 ingredients · Amino acid/Protein
Off Market
L-Tryptophan 500 mg
Jarrow Formulas
5 ingredients · Amino acid/Protein
Off Market

Nearby Ingredients in Other

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

Compare capsule vs Calories →

Nationwide ingredients with similar DSLD presence

Two peer sets for capsule: closest on total DSLD label listings (14,234 here) and closest on distinct brands that list it (965 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 capsule

How many supplement products contain capsule?
14,234 supplement product labels in the NIH DSLD currently lists capsule as an ingredient. By label frequency it ranks #15 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.

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.