Ashwagandha Root Extract

Single-ingredient ashwagandha root extract reference formula at an example 500 mg per serving, developed as a capsule, with a powder option at a 1,000 mg serving.

Ashwagandha is a reference formula for brands building a single-ingredient botanical extract product around example amounts of 450 to 2,000 mg per serving, with 500 mg shown as the example. The extract is the only active ingredient, so the development work centers on the withanolide standardization of the extract, the fill weight of a bulky botanical powder and the label statements that go with an herbal ingredient.

Capsule is the lead format because a 500 mg extract fits one standard capsule, and a powder version at a 1,000 mg serving serves brands that sell a drink mix. Whole-root powders and root extracts are different raw materials, and the reference labels mix both, so the page is built around the extract.

Ingredient Composition

IngredientPer ServingRaw Material FormAlternative Form (same amount of active)
Ashwagandha500 mg (example amount)Ashwagandha root extract standardized to withanolides, for example the Ashwagandha Extract 2.5–10% Withanolides grade; specification 500 mg extract per serving, withanolide content set with the supplierGeneral Ashwagandha Root Extract Powder with a different withanolide content, or Ashwagandha Root Powder for a whole-root product with a much larger fill weight

Amounts are stated as mg of ashwagandha extract, not of withanolides. The withanolide amount per serving equals the extract weight multiplied by its assay, so a 500 mg serving of a 2.5% extract carries about 12.5 mg of withanolides and a 10% extract carries about 50 mg, and the grade is part of the specification.

Intended Benefits & Formula Rationale

This formula is designed for products positioned around botanical stress nutrition. Ashwagandha extract is included as the single active so that the standardization, the amount and the excipient system can be set without interaction with other actives.

Intended Benefit DirectionKey IngredientsFormulation Rationale
Traditional botanical nutritionAshwagandhaIncluded as Withania somnifera, a plant widely used in Indian Ayurvedic medicine and now sold in dietary supplements in the United States and Europe [2]. Evidence: Referenced
Stress and anxiety studiesAshwagandhaA meta-analysis of 12 randomized trials with 1,002 participants reported lower anxiety (SMD -1.55) and stress (SMD -1.75) scores than placebo, with a favorable dose-response for stress at 300 to 600 mg per day, high heterogeneity and low-certainty evidence [1]. Evidence: Mixed

The extract weight is the stated amount, and the grade moves the dose of the active compounds. The trial dose range in [1] is expressed as extract per day, so amount, claims and target market are brand decisions reviewed for each sales market, together with the liver note below.

Available Formats

The ashwagandha reference formula is built for a capsule version and a powder version; counts per serving are design choices that the brand can adjust.

FormatUnitPer ServingPack SizeOther Ingredients (typical)Suitability
Capsule1 capsule500 mg extract60 or 120 capsulesPlant fiber cellulose, flow agent, vegetable capsule shellLead format; extract in a standard fill
Powder1 stick pack1000 mg extract30 stick packsDiluent, sweetener, flavor, anti-caking agentDrink mix; bitter and earthy notes need masking

Raw Material Input & Fill (Design Estimate)

Design estimates. The input is the labeled extract weight at an assumed 100% assay of the extract as purchased, so 500 mg of extract per capsule is used as the input; the withanolide content follows from the grade and is fixed in the specification.

FormatRaw Material Input per UnitDesign FillBalance for ExcipientsVerification Before Scale-Up
Capsule500 mg extract560 mg per capsule60 mgFlow, fill weight variation, withanolide assay, moisture
Powder1000 mg extract3500 mg per stick2500 mgDispersion in water, taste masking, withanolide assay

Softgel, tablet and gummy versions are separate projects, because a bulky root extract with a bitter profile needs its own matrix work in those systems.

Formulation Considerations

Extract grade sets the dose of actives. A 500 mg serving carries from about 12.5 mg to about 50 mg of withanolides across the 2.5% to 10% range. The specification names the withanolide assay, and a change of grade is a change of dose.
Liver safety signal. A case series from Iceland and the US Drug-Induced Liver Injury Network described five patients with cholestatic or mixed liver injury attributed to ashwagandha-containing supplements, with a latency of 2 to 12 weeks, prolonged pruritus and hyperbilirubinemia, and normalized liver tests within 1 to 5 months in four patients [2]. The label statement, the amount tier and the target market are reviewed against this finding.
Bitter, bulky extract. Root extracts are bulky and bitter, so the capsule size sets the fill and a powder version needs a flavor system that covers the earthy note. Moisture and flow of the received lot are checked before fill weights are fixed.
Extract or root powder. The reference labels pool extracts with whole-root powders at gram amounts. Powders carry a much smaller share of withanolides per milligram, so they are kept as a separate project rather than an option on this page.

Customization Options

Brands adjust the extract weight, the withanolide grade, the format and the add-ons.

ParameterRangeNote
Extract per serving450, 500 or 1000 mgExamples for the brand; capsule count or stick size changes with the tier
Withanolide grade2.5% to 10%Changes the withanolide dose per serving and the input weight
FormatCapsule or powderSoftgel, tablet and gummy are separate projects
Pack size30 to 120 unitsSet by the brand
Add-onsL-theanine, magnesium, vitamin DTheanine or magnesium adds powder weight to the stick and raises the capsule count

The pilot run confirms flow and fill weight of the extract blend, taste masking in the powder version, and the withanolide assay of the first units against the specification.

Flavor Options

FormatSuggested FlavorsWhy
PowderChocolate, vanilla chai, mixed berryDark and spiced profiles cover the earthy bitterness of the root

Technical Status & Data Sources

ItemStatusDetails
Reference formulaNIH DSLDThe ingredient and amount come from a labeled product in the NIH DSLD (500 mg on the label of CF014238; example DSLD labels 205389, 231978, 231980). The label names the ingredient as ashwagandha extract; a withanolide-standardized root extract is set as the form.
SpecificationSet in formulationAshwagandha root extract, 500 mg per serving, standardized to withanolides; withanolide assay, solvent residue, pesticide and heavy-metal 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] Akhgarjand C, Asoudeh F, Bagheri A, et al. Does Ashwagandha supplementation have a beneficial effect on the management of anxiety and stress? A systematic review and meta-analysis of randomized controlled trials. Phytother Res. 2022;36(11):4115-4124. DOI · PubMed<br>[2] Björnsson HK, Björnsson ES, Avula B, et al. Ashwagandha-induced liver injury: A case series from Iceland and the US Drug-Induced Liver Injury Network. Liver Int. 2020;40(4):825-829. DOI · PubMed

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