5-HTP

Single-ingredient 5-hydroxytryptophan reference formula at 50 mg per serving, developed as a capsule or tablet, with 100 and 200 mg options.

5-HTP is a reference formula for brands building a single-ingredient amino acid derivative product at a default amount of 50 mg of 5-hydroxytryptophan per serving. 5-HTP is the only active ingredient, so the development work centers on a small-dose active in a light fill: raw material purity and source, blend uniformity and the label and market review that follow from the compound’s safety history.

Capsule is the lead format because 50 mg of powder blends into a small standard fill, while the tablet uses the same active in a compression system. Reference amounts of 100 and 200 mg sit beside the default, and the final amount is a decision for the brand and its market review.

Ingredient Composition

IngredientPer ServingRaw Material FormAlternative Form (same amount of active)
5-HTP50 mg (default amount)5-Hydroxy-L-tryptophan, high-purity powder, specified on a 5-HTP basis; 50 mg 5-HTP per servingThe same compound from another source or purity grade, with the input recalculated to 50 mg of 5-HTP

Amounts are stated as mg of 5-hydroxytryptophan (C11H12N2O3, 220.22 g/mol; PubChem CID 144). The compound is a single free amino acid derivative, so no salt conversion applies, and the input equals the labeled amount at the assay of the raw material. Purity, source and impurity limits are set in the specification with the supplier.

Intended Benefits & Formula Rationale

This formula is designed for products positioned around amino acid nutrition and mood and sleep nutrition. 5-HTP is included as the single active so that the purity, the amount and the excipient system can be set without interaction with other actives.

Intended Benefit DirectionKey IngredientsFormulation Rationale
Serotonin precursor nutrition5-HTPIncluded as the immediate precursor in the biosynthesis of serotonin from the essential amino acid L-tryptophan [2]. Evidence: Referenced
Mood nutrition research5-HTPA review covers the preclinical and clinical evidence on 5-HTP for depression, with emphasis on double-blind, placebo-controlled trials, and also reviews safety issues with eosinophilia myalgia syndrome and serotonin syndrome [1]. Evidence: Mixed

A single stated amount lets the brand pick one tier per market. The safety history in [1] and [2] is part of the review that every market and every claim goes through.

Available Formats

The 5-HTP reference formula is built for a capsule version and a tablet version; counts per serving are design choices that the brand can adjust.

FormatUnitPer ServingPack SizeOther Ingredients (typical)Suitability
Capsule1 capsule50 mg60 or 90 capsulesArrowroot flour, hypromellose vegan capsule shellLead format; small fill of one active
Tablet1 tablet100 mg60 or 100 tabletsMicrocrystalline cellulose, croscarmellose sodium, stearic acid, silicon dioxideCompressed unit for the 100 mg option

Raw Material Input & Fill (Design Estimate)

Design estimates. The input is the labeled amount divided by the assumed assay of the raw material, taken at 100% 5-HTP, so 50 mg needs 50 mg of raw material per capsule and 100 mg per tablet.

FormatRaw Material Input per UnitDesign FillBalance for ExcipientsVerification Before Scale-Up
Capsule50 mg200 mg per capsule150 mgBlend uniformity, fill weight variation, content assay of 5-HTP
Tablet100 mg300 mg tablet weight200 mgContent uniformity, hardness, disintegration, content assay of 5-HTP

Powder, liquid and gummy versions are separate projects, because a small-dose amino acid derivative in a dissolving or chewable system needs its own homogeneity and taste work.

Formulation Considerations

Small dose in a light fill. At 50 mg in a 200 mg capsule, the active is a quarter of the fill, and the blend is made by a geometric dilution. Content uniformity across the first units decides whether the dilution holds.
Purity and impurity profile. A review of the safety of 5-HTP notes that analyses of several sources found no toxic contaminants like those tied to the contaminated tryptophan lots of 1989, and that a minor chromatographic peak lacks credibility [2]. The specification names the purity and the impurity limits, and the supplier’s certificate is checked lot by lot.
Safety and interaction review. The review in [1] covers eosinophilia myalgia syndrome and serotonin syndrome, and notes that the amount of 5-HTP reaching the nervous system depends on peripheral decarboxylase activity. Label statements and market review for the finished product take these points into account.
Amount tier. The reference amounts are 50, 100 and 200 mg per unit. The amount, the number of units per day and the claims are brand and market decisions made before a product is developed.

Customization Options

Brands adjust the amount per serving, the raw material source, the format and the add-ons.

ParameterRangeNote
Amount per serving50, 100 or 200 mgOptions for the brand; each tier is checked against the rules of the sales market
Raw material sourcePurity and source set with the supplierChanges cost, impurity profile and the certificate review
FormatCapsule or tabletPowder, liquid and gummy are separate projects
Pack size30 to 120 unitsSet by the brand
Add-onsMagnesium, vitamin B6, L-theanineMagnesium or B6 adds fill weight and a second uniformity check

The pilot run confirms blend uniformity of the 50 mg charge, tablet hardness and disintegration in the 100 mg version, and the content assay of 5-HTP in the first units against the labeled amount.

Technical Status & Data Sources

ItemStatusDetails
Reference formulaNIH DSLDThe ingredient and amount come from a labeled product in the NIH DSLD (50 mg on the label of CF000818; example DSLD labels 6091, 11724, 11728). The label names the ingredient as 5-HTP; 5-hydroxy-L-tryptophan is set as the form.
SpecificationSet in formulation5-Hydroxy-L-tryptophan, 50 mg per serving; purity, impurity profile and residue limits and method are fixed with the supplier. Unit size, fill weight and stability are set in formulation.
Data sourceNIH DSLDDSLD v9.4.0, downloaded 2026-01-10: 50,824 reference formulas merged from on-market labels with complete ingredient amounts. Counts show how labels are distributed.
Market reviewPer marketDose limits, labeling and claims are reviewed for each sales market before a finished product is developed.
ReferencesSources[1] Turner EH, Loftis JM, Blackwell AD. Serotonin a la carte: supplementation with the serotonin precursor 5-hydroxytryptophan. Pharmacol Ther. 2006;109(3):325-38. DOI · PubMed<br>[2] Das YT, Bagchi M, Bagchi D, et al. Safety of 5-hydroxy-L-tryptophan. Toxicol Lett. 2004;150(1):111-22. DOI · PubMed

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