DHA Oil

DHA (docosahexaenoic acid) reference formula at a default of 100 mg per serving, developed as a softgel or liquid.

DHA is a reference formula for brands building a single-ingredient omega-3 DHA product around 100 mg per serving. The brand sets the final amount for its market, and reference labels span 250 to 1,000 mg per serving for the higher-dose products.

Softgel is the lead format because DHA is an oil and nearly all reference labels are softgels, with an oil-in-water liquid developed alongside. The work centers on the oil: its DHA concentration, its source and its oxidation state shape the fill, the antioxidant system and the shelf life.

Ingredient Composition

IngredientPer ServingRaw Material FormAlternative Form (same amount of active)
DHA100 mgDHA oil (algal or fish source), specified as DHA content; 100 mg DHA per servingA DHA concentrate in ethyl ester or triglyceride form, with the input recalculated from its DHA percentage

The amount is stated as mg of docosahexaenoic acid, not of oil. DHA is C22H32O2, 328.5 g/mol (PubChem CID 445580). Triglyceride, ethyl ester and free fatty acid forms carry different weights of oil per milligram of DHA, so the specification states the form and the DHA content.

Intended Benefits & Formula Rationale

This formula is designed for products positioned around omega-3 nutrition. DHA is included as the single ingredient so that the concept stays on one long-chain fatty acid.

Intended Benefit DirectionKey IngredientsFormulation Rationale
Omega-3 intakeDHAA review reports that prospective studies and three new meta-analyses suggest that fish or n-3 PUFA intake is associated with a reduction in the development of mild cognitive decline and Alzheimer’s disease [1]. Evidence: Referenced
Cognitive functionDHAThe same review reports that DHA supplementation in randomized trials of people with mild cognitive impairment showed benefit on cognitive decline, whereas there was no benefit in Alzheimer’s disease, and that among 15 trials in cognitively healthy people over 55, seven reported benefit and eight did not [1]. Evidence: Mixed

The amount is a design choice. The review in [1] covers omega-3 fatty acids and DHA trials of different doses and does not test this formula, so any claim on a finished product is reviewed for each market.

Available Formats

Nearly all reference labels are softgels, with a few liquids behind them; softgel and liquid are developed here.

FormatUnitPer ServingPack SizeOther Ingredients (typical)Suitability
Softgel1 softgelDHA 100 mg60 or 120 softgelsGelatin or plant-based shell, glycerin, mixed tocopherolsLead format; oil in a sealed shell
Liquid5 mLDHA 100 mg150 mL bottle (30 servings)Water, emulsifier, sweetener, flavor, mixed tocopherols, preservativeOil-in-water emulsion; flavor needed

Raw Material Input & Fill (Design Estimate)

Design estimates. The DHA oil is assumed to contain 40% DHA by weight, so 100 mg of DHA needs 250 mg of oil per serving; the supplier’s DHA assay and the oil form replace this once the grade is chosen.

FormatRaw Material Input per UnitDesign FillBalance for ExcipientsVerification Before Scale-Up
SoftgelDHA oil 250 mg300 mg fill50 mgDHA assay and peroxide value after encapsulation, fill weight spread, shell integrity
LiquidDHA oil 250 mg per 5 mL5 mL servingabout 4.7 mL of water phase and additivesDroplet size and creaming, peroxide value over shelf life, taste and fishy aftertaste

Capsule, powder and gummy are separate projects, because DHA oil needs a microencapsulated powder or a gummy-compatible oil system to work in those formats.

Formulation Considerations

Oxidation. DHA is a highly unsaturated fatty acid and oxidizes quickly. A review points out that marine omega-3 oils are highly prone to oxidation to lipid peroxides and recommends that the peroxide value and anisidine value be reported [2]. Both are tracked on the incoming oil and on stability.
Source. Algal DHA and fish-oil DHA are both sold. The source decides allergen labeling, the market positioning and the typical DHA concentration, and the specification states it.
Antioxidant system. Mixed tocopherols, rosemary extract or ascorbyl palmitate are the usual choices. The system is selected together with nitrogen flushing during filling and opaque packaging.
Taste in the liquid. An oil emulsion carries a fishy note even from algal oil, so the liquid format relies on emulsifier choice, flavor strength and a short shelf-life target that is confirmed by stability data.

Customization Options

Brands adjust the amount, the source, the format and the add-ons.

ParameterRangeNote
DHA per serving100, 200, 300 or 600 mgExamples for the brand; softgel size follows the oil volume
SourceAlgal or fishSets allergen labeling and the DHA concentration
Oil formTriglyceride or ethyl esterChanges the weight basis and absorption profile
FormatSoftgel or liquidCapsule, powder and gummy are separate projects
Add-onsEPA, vitamin D, cholineA second ingredient changes the oil volume and the claim wording

The pilot run confirms the DHA assay and peroxide value after encapsulation, the softgel fill and seal, and the emulsion stability after a heat cycle.

Flavor Options

FormatSuggested FlavorsWhy
LiquidOrange, berry, vanillaStrong flavors cover the marine note of the oil

Technical Status & Data Sources

ItemStatusDetails
Reference formulaNIH DSLDThe ingredient and amount come from a labeled product in the NIH DSLD (100 mg on the label of CF003298; example DSLD labels 21071, 22958, 45725). The label names the ingredient as DHA; the oil source is set in formulation.
SpecificationSet in formulationDHA oil at 100 mg DHA per serving with a stated oil form and source; DHA assay, peroxide value, anisidine value, acid value, microbial 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] Welty FK. Omega-3 fatty acids and cognitive function. Curr Opin Lipidol. 2023;34(1):12-21. DOI · PubMed<br>[2] Albert BB, Cameron-Smith D, Hofman PL, et al. Oxidation of marine omega-3 supplements and human health. Biomed Res Int. 2013;2013:464921. DOI · PubMed

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