Replacing sugar with a fruit-based ingredient changes solids, water and texture together. The research is a reason to design product-specific trials, not a recipe to copy or a health claim to publish.
What the orange-jam and date-paste study examined
A 2025 paper in Processes (volume 13, issue 12, article 3956) examined partial substitution of sugar with date paste in orange jam. The published abstract frames the work as a formulation study and reports that the substitution affects quality and texture characteristics. We reviewed the published abstract for this article; we did not use the full text to extract numerical outcomes or to present the study as a production validation.
The research stage matters. This is a product-formulation study, not a demonstration that a particular jam line will deliver a lower-sugar product at commercial scale. It is also not a regulatory determination that a reformulated preserve may be called jam in a given market. Those are separate questions that belong to the product developer, the process authority and the market reviewer.
The useful signal is simpler: date paste is not an inert replacement for sugar. It brings its own solids, fibre, water and sugars into the recipe. When one ingredient is replaced, the water balance and the structure-forming ingredients no longer sit in the same relationship. A trial that changes only the sugar number is not testing the new formulation.
Texture is formulation-dependent
Jam texture comes from a combination of fruit solids, sugar, water, acid, pectin or another gel system, and the way the batch is heated and cooled. Change one of those inputs and the others may need to move as well. The abstract reports that total soluble solids and viscosity increased as the date-paste replacement level rose in that trial, and that sensory acceptance differed among the samples. Those are observations from one orange-jam formulation, not a universal replacement ratio or a recipe that will work for every fruit.
A lower-sugar trial should compare a control product and one or more formulation variants using the same assessment method. Record the cooled texture, spreadability, visible syneresis, particle condition and flavour observations at defined times. If the product is stored, include the storage conditions and the assessment points in the plan rather than judging only the day of manufacture.
Do not treat a texture result as a shelf-life result. A jam that looks acceptable after cooling may still change during storage, and a product that passes a visual check may not meet the intended preservation basis. The formulation study and the preservation study can inform each other, but one does not substitute for the other.
Sugar substitution is not a regulatory identity decision
Product names carry composition and labelling expectations. The FAO-WHO Codex standards directory is the entry point for the applicable standard, but the current text, its scope and the national rules of the intended market must be checked. A lower-sugar preserve may or may not meet the compositional identity of "jam" in a particular jurisdiction, and the answer is not settled by a trial result or a supplier's product description.
Keep the regulatory question separate from the equipment question. A cooker can heat and mix a formulation; it cannot decide whether the resulting product may be labelled as jam, reduced-sugar jam or another category. Ask the qualified market reviewer to confirm the product identity, the ingredient declaration and any claim that will appear on the pack.
The same discipline applies to health or nutrition messages. The study is not evidence that a date-paste substitution reduces calorie intake, improves health or delivers a therapeutic benefit. Without finished-product evidence and an appropriate regulatory basis, those claims should not be made.
Thermal and package assumptions need revalidation
Changing the sugar and water relationship can change the product's preservation behaviour. A process that was demonstrated for a conventional formulation should not be assumed to transfer unchanged to a lower-sugar variant. The thermal process, the filling condition, the container, the closure and the storage conditions all belong to the new product's validation plan.
This is especially important where the product is described as reduced-sugar but is expected to be shelf stable at ambient temperature. The formulation, water activity, pH and thermal treatment interact. A visual fill check or a closure check is a quality observation, not a demonstration that the preservation system is adequate.
Package compatibility should be rechecked as well. A different product texture or filling temperature may affect how the product flows into the container, how it wets the closure area and how it behaves during cooling. The container and closure suppliers should see the proposed conditions, and the filling trial should include the actual pack rather than a generic jar.
A trial brief for a lower-sugar concept
Write the trial brief around the product, not around a target sugar percentage alone. State the control recipe and the proposed substitution; the ingredient specifications, including the date paste or other replacement; the fruit identity and preparation; the intended gel system; the cooking route; the endpoint methods; and the package and storage conditions. Identify which measurements are exploratory and which are acceptance criteria.
Include a regulatory review before the trial is scaled. Confirm the product name and the claims that may be used, then design the trial so that the results can support those decisions. If the market position depends on a nutrition claim, involve the qualified reviewer early rather than after the samples have been made.
The equipment conclusion comes last. A lower-sugar product may need different mixing, different evaporation or a different filling condition, but that should follow the trial evidence. Do not buy a machine because it is described as suitable for low-sugar products, and do not assume that a conventional line can make the new formulation simply because it can make the old one. The trial brief is the first deliverable; the equipment specification is the response to it.
SOURCES & SCOPE
Where this analysis comes from
The links below identify the primary or official publications used for this article. They are sources for background and process principles, not evidence that a particular machine, project or commercial result exists.
- Processes 2025, 13(12), 3956: Low-calorie orange jam containing date paste as a sugar substitutemdpi.com
Primary research article; published abstract and Crossref metadata reviewed. No numerical outcomes, recipe transfer or production guarantee is made here.
- FAO-WHO Codex Alimentarius, standards directoryfao.org
Entry point for product identity standards. The applicable current standard and market rules must be verified separately.
- UNIDO, Small-scale fruit and vegetable processing and productsunido.org
Quality-assurance and production-method context. Not evidence of a validated reduced-sugar process.