Horse electrolytes: designing the formulation

Developing horse electrolytes? Explore serving composition, salt selection, product formats, quality control and EU requirements for dietetic feed.

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mgr farm. Maciej Jaskólski
2026-10-02
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Two electrolyte products may have similar packaging yet deliver very different amounts of ingredients per serving. Developing horse electrolytes should therefore begin with intended use, serving composition and administration. The number of minerals listed is not enough to assess a formula.

For a brand, this means connecting nutritional reasoning, technology and legal classification before selecting flavour or pack size.

Intended use defines the brief

A product intended for intense exercise needs a different rationale from a blend designed for routine ration supplementation. Define the target horses, conditions of use, base diet and provision of water.

Electrolyte studies investigate specified conditions. One example is research on acid-base changes after pre-exercise electrolyte administration. Its protocol is not a universal instruction for every product, exercise session and horse. For developers, it illustrates why composition must be assessed alongside fluid volume, administration timing and workload.

Copying a competitor's label is not a sufficient formulation strategy. Without its development assumptions and documentation, the result is only a similar ingredient list.

Calculate elemental content, not merely salt mass

The mass of sodium chloride is not the mass of sodium. Likewise, different magnesium or calcium compounds can supply different elemental amounts at the same raw material weight. Calculations should reflect chemical identity, hydration state and supplier specification.

As an arithmetic example, not a feeding recommendation, 10 g of pure NaCl supplies approximately 3.93 g of sodium and 6.07 g of chlorine as chloride. For a commercial material, correct the result for its assayed content. When comparing products, use the serving specified in the directions rather than pack size.

Apply the same logic to cost. Price per kilogram does not show the cost of administering a serving with a defined composition. That comparison is necessary for a fair assessment of product concepts.

Powder, liquid and paste require different trials

For a powder, assess homogeneity, segregation, caking and scoop repeatability. If it is intended for dissolution, evaluate preparation in the specified water volume.

A liquid requires assessment of system stability, sediment or crystallisation and dispensing. A paste adds questions about uniformity and emptying the applicator. Every format needs acceptance testing using the intended method of administration.

Directions must account for access to water and should not imply that a concentrated serving replaces hydration. No single regime fits all horses, diets and workloads.

Developing an equine product range? Contact FoodUP at team@foodup.com.pl. We help define the brief, calculate the formula and specify manufacturing requirements.

Check whether the project falls within dietetic feed rules

This is an important decision that can be missed during label development. Entry 68 of Regulation (EU) 2020/354 addresses compensation of electrolyte loss in cases of heavy sweating in equines. Use of that intended purpose requires assessment of every applicable condition, including essential nutritional characteristics, declarations and instructions.

A product does not automatically become dietetic feed merely because it contains mineral salts. Equally, a specific intended purpose from the Annex cannot simply be adopted as an advertising phrase while its conditions are ignored. Determine the appropriate route using the final product design.

General labelling and claims rules also follow from Regulation (EC) No 767/2009. Before printing, conduct a feed label review, including consistency with the product website.

Define what the first batch must demonstrate

The quality plan should include parameters that establish conformity with the formula and support correct use. Depending on the project, these may include selected ingredient assays, blend homogeneity, physical properties and stability in the final packaging.

Regulation (EC) No 183/2005 establishes requirements for organising quality control. Methods and frequencies must suit the process. A supplier's general statement that a product is “tested” does not replace an agreed specification.

FAQ

Do more minerals make a better electrolyte product?

No. The relevant factors are a justified serving composition, intended use and consideration of the complete ration.

Should products be compared by price per kilogram?

That can be useful, but development decisions also require the cost of a serving with a comparable composition.

Is every electrolyte product dietetic feed?

No. Classification depends on intended use and fulfilment of the relevant legal conditions. It requires assessment of the individual product.

Can any electrolyte powder be administered in water?

Do not assume so. Solubility, acceptance and directions must be checked for the particular formulation.

Sources

Regulation (EU) 2020/354: intended uses of feed for particular nutritional purposes.

Regulation (EC) No 767/2009.

Regulation (EC) No 183/2005.

Tracing Acid-Base Variables in Exercising Horses: Effects of Pre-Loading Oral Electrolytes.

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