Medical nutrition companies
Adding an ambient format to a range, or moving an existing product from powder to a ready-to-consume pack.
Retort category
Clinical and medical nutrition
Products built to a specified nutritional profile, made shelf-stable at ambient. The difficulty is not sterility — it is that the heat which delivers commercial sterility also attacks the protein quality, the vitamin content and the texture that the profile depends on. We measure what the cycle actually costs each nutrient, set the overage that protects the declaration, and validate the profile on the finished pack rather than on the recipe.
What we develop
Clinical and medical nutrition products we take through the pilot
Retort suits clinical nutrition where the product is a meal, a puree, a semi-solid or a format carrying solids, and has to sit on an ambient shelf. Formulation and packaging are assessed for compatibility with thermal sterilization before any run, and every product gets its own scheduled process rather than a borrowed one, at our pilot retort unit in Chennai, India.
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Therapeutic and Recovery Meals
Ready-to-eat meals built to a defined nutritional profile for recovery, undernutrition and convalescence, carrying the energy and protein density the profile calls for.
Develop a therapeutic meal -
Disease-Specific Meals and Bases
Formats built around a condition — low-glycaemic, renal, cardiac, gastrointestinal — where the composition, not the flavour, is the specification.
Develop a disease-specific product -
High-Protein and High-Energy Formats
Products delivering protein and calories in a small serve, where the protein system has to survive sterilization without gelling, sedimenting or thickening on the shelf.
Develop a high-protein format -
Texture-Modified and Easy-to-Chew Formats
Purees, soft meals and modified-consistency products for patients with chewing or swallowing difficulty, where the consistency has to be the same after the cycle as before it.
Develop a texture-modified product -
Fortified Purees and Nutrient-Dense Bases
Vitamin and mineral fortified bases and purees, with the overage set from measured retention rather than from a textbook retention factor.
Develop a fortified format -
Hospital and Institutional Patient Meals
Portion-standardised patient meals produced centrally and shipped ambient, for hospitals, care homes and institutional catering.
Develop a patient meal
Why a pilot first
Where clinical nutrition fails in a retort
A clinical nutrition product has a second way to fail that ordinary food does not: it can come out of the retort perfectly safe, perfectly palatable, and no longer meeting the profile on its own label. These are the failures a pilot run is designed to surface.
- Protein gels or sediments Above roughly 8–10 per cent total protein, whey aggregates uncontrollably under sterilization temperatures. The product thickens in the retort, sediments on the shelf, or gels months later.
- Lysine blocks and protein quality falls Lysine reacts with reducing sugars and stops being bioavailable. Total protein on the certificate is unchanged, and a nitrogen method will never see it — but digestibility has dropped.
- Labile vitamins collapse A retort cycle takes far more vitamin C and thiamine than an aseptic process does. Dose to the recipe and the pack is under its own declaration before it leaves the warehouse.
- Emulsion breaks High-energy-density products carry a large oil phase. Heat thins the continuous phase and denatures the protein holding the interface, and the fat creams out during the hold.
- Consistency drifts off its level A texture set before the cycle is not the texture after it. Native starch breaks down and then retrogrades; protein aggregation pushes viscosity the other way.
- The declaration fails mid-shelf-life Declared values have to hold to the end of shelf life, inside a tolerance band. Processing loss plus storage loss plus analytical variability will breach it unless the overage was derived from real data.
None of these show up in a kitchen trial. They show up in a retort, and then in an analysis of what came out of it.
What we change
The levers we pull to make it hold its profile
Reformulating for retort is not about weakening the product. It is about choosing a system that arrives at the specified profile after the heat, rather than before it.
- Casein-to-whey ratioCaseins cap whey aggregate growth and act as the stabilising fraction. Shifting the ratio is the single biggest lever on whether a high-protein product survives the cycle intact.
- Controlled pre-denaturationDenature the protein deliberately, under controlled heat and shear, before it reaches the retort — so it cannot denature on its own terms inside the cycle.
- Reducing-sugar managementMaltodextrin chain length, lactose-reduced or lactose-free protein sources and pH all decide how much Maillard damage the cycle inflicts on lysine.
- Overage from measured retentionRetention factors are established for your formulation, your container and your cycle, then confirmed by stability study. A textbook factor either fails the declaration or wastes expensive actives.
- Hydrocolloid systemHeat- and shear-stable gums hold consistency where native starch gelatinises, breaks down and then retrogrades on the shelf.
- Fat system and homogenisationChain length, emulsifier choice and homogenisation pressure are developed together with the thermal cycle, because the emulsion has to be stable after the retort, not before it.
Packaging
Formats it can ship in
Pack formats we run
- Retort pouchFlat or stand-up — fast heat penetration, which means less nutrient loss for the same lethality
- Semi-rigid trayPortioned patient meals and single-serve therapeutic formats, sealed with lidding film
- Cup and bottleSingle-serve drinkable formats where the product is consumed straight from the pack
- CanRobust and light-tight, which matters for the oxidation- and light-sensitive nutrients
Pack choice is a nutritional decision as much as a logistics one. A thinner profile reaches lethality faster and costs the labile vitamins less, and a light-tight pack protects a different set of nutrients again. Heat penetration and seal integrity studies settle which one suits your product.
What we need from you
- Target nutritional profile
- Per 100 g, per 100 ml or per serve — and which market's reference values it is built against
- Protein source and level
- Intact, hydrolysed or amino acid, and the casein-to-whey split if dairy
- Energy density
- Calories per ml or per serve, which decides how much fat the emulsion has to carry
- Micronutrient specification
- Which vitamins and minerals are declared, at what level, and in which salt or chelate form
- Consistency requirement
- The consistency or texture level the finished product has to meet, and how it is assessed
- Intended use and market
- The condition it is for dietary management of, and the countries it will be sold into
Who we develop for
Manufacturers, institutions and programme buyers
Clinical and medical nutrition products are developed here for the organisations that have to put them in front of a clinician, a procurement team or a regulator.
Nutraceutical and functional food brands
Taking a product from general wellness into a defined clinical or dietary need, where the profile becomes the specification and has to be proven on the finished pack.
Hospitals, care homes and institutional caterers
Producing patient meals centrally to a standardised portion and profile, and shipping them ambient without a cold chain.
Public health and institutional programmes
Supplementary and therapeutic feeding for nutrition programmes, where composition, shelf life and cost per serve are all fixed by the tender.
Private label and OEM buyers
Sourcing a clinical nutrition product under your own brand, needing the formulation and the process proven before a co-packer is committed.
NPD, R&D and regulatory teams
Inside an established manufacturer, needing pilot capacity, thermal process expertise and post-process analysis without tying up a commercial line.
The technical side
Clinical nutrition and thermal processing, in the terms your file will use
If you are briefing an R&D, regulatory or quality team, or answering a hospital tender or an importer’s technical questionnaire, these are the concepts a clinical nutrition retort project is actually built on.
Formulation and process terms
- Nutritionally complete or incomplete
- Whether the product can serve as a sole source of nourishment or only as part of a diet. It is the first classification question a clinical nutrition product has to answer, and it changes both the composition and the label.
- Delivered profile
- What the finished, processed pack actually contains — as distinct from what the recipe contains. It is the delivered profile that is regulated, declared and audited.
- Retention factor
- The proportion of a nutrient that survives processing, for one formulation in one container on one cycle. Measured, not assumed.
- Overage
- The extra quantity of a labile nutrient dosed at manufacture so the declared level still holds at the end of shelf life. Set from retention data and stability results.
- Tolerance band
- The permitted spread around a declared value. Processing loss, storage loss and analytical variability all have to fit inside it for the whole of shelf life.
- Blocked lysine
- Lysine bound into Maillard reaction products. Still counted by a total-protein or acid-hydrolysis method, no longer available to the patient — which is why protein quality needs its own analysis after processing.
- Age gelation
- Non-enzymatic gelling that appears weeks or months after a heat-treated high-protein liquid was produced. It is a shelf-life failure, so only a stability programme finds it.
- Energy density
- Calories per millilitre or per serve. Raising it usually means raising the fat fraction, which makes the emulsion the limiting factor rather than the protein.
- Osmolality
- The solute concentration of a liquid formula. It is declared for clinical nutrition products because it affects tolerance, and it moves when the carbohydrate system is changed.
- Commercial sterility
- The state a low-acid product has to reach: no microorganisms capable of growing under normal ambient storage. A process outcome, not an ingredient.
- F0 and the botulinum cook
- Accumulated lethality at the cold spot in equivalent minutes at 121.1 °C. The minimum for a low-acid food is F0 3, a twelve-log reduction of Clostridium botulinum spores.
- Scheduled process
- The validated combination of time, temperature, pressure and fill that delivers commercial sterility for one specific product in one specific container.
- Temperature distribution study
- Mapping the retort itself before the product goes in — finding the slowest-heating position in the vessel across a full load. It is a separate study from heat penetration, and it comes first.
- Heat penetration study
- Thermocouples placed at the cold spot of the pack, through a full cycle, in the slowest-heating position the distribution study identified. This is what the scheduled process is calculated from.
- Incubation testing
- Finished packs held at elevated temperature for a set period and then examined for swelling, pH shift and spoilage — the check that the process actually delivered commercial sterility. 21 CFR 113 defines incubation but does not mandate it; US canned meat and poultry must be incubated under 9 CFR 431.10 at 95 ± 5 °F for not less than 10 days.
- Challenge testing
- Deliberately inoculating product with a target or surrogate organism to prove the process controls it. Used when the formulation sits near a critical limit rather than comfortably inside it.
- Process deviation
- A cycle that ran short, cool or interrupted. The batch is not automatically lost — but the deviation has to be evaluated against the scheduled process and the decision documented before it can be released.
- Water activity (aw)
- Free water available to microorganisms. 21 CFR 113.3 defines a low-acid food as one with finished equilibrium pH greater than 4.6 and aw greater than 0.85, so a product at or below 0.85 sits outside Part 113. Above both thresholds the product needs a scheduled process delivering commercial sterility — which can be reached by heat, by acidification under Part 114, or by controlling water activity combined with heat.
What the destination market asks for
- India — FSSAIFood for Special Medical Purpose sits inside the nutraceuticals and foods for special dietary use regulations. Packs must carry “FOOD FOR SPECIAL MEDICAL PURPOSE” near the brand name, “RECOMMENDED TO BE USED UNDER MEDICAL ADVICE ONLY” in bold, and “For the dietary management of…” naming the condition — and that condition statement is subject to approval by the Authority on scientific and clinical evidence. India gates the indication in a way the EU does not.
- European Union — FSMPRegulation (EU) 609/2013 with Delegated Regulation (EU) 2016/128. Three categories: nutritionally complete with a standard formulation, nutritionally complete with an adapted formulation, and nutritionally incomplete. Composition is assessed on the product ready for use. There is no pre-market authorisation — the operator notifies each Member State — but nutrition and health claims are prohibited on an FSMP. The product communicates through its intended-use statement, not through a claim.
- United States — medical foodDefined in the Orphan Drug Act and at 21 CFR 101.9(j)(8). The criteria are read far more narrowly than the EU reads FSMP: the FDA position is that a condition must create distinctive nutritional requirements, and it has declined to treat diabetes on that basis. A product that is comfortably an FSMP in Europe may be a conventional food in the United States.
- Codex AlimentariusCXS 180-1991 covers the labelling of and claims for foods for special medical purposes — use under medical supervision, the dietary-management statement, sole-source declaration and the warning against parenteral administration. It is the reference most national rules are built on.
- Thermal processing rulesWhatever the nutritional classification, an ambient low-acid product is a thermally processed food first: 21 CFR 113 in the United States with a scheduled process filed and reviewed by a process authority, the Codex code of practice internationally, and HACCP and GMP underneath both.
- Label declaration and tolerancesDeclared vitamin and mineral values have to hold within a tolerance band across the whole of shelf life. That is the rule the overage exists to satisfy, and it is why the declaration is built from stability data rather than from the formulation sheet.
- ISO 22000 and FSSC 22000Food safety management certification, and the scheme an international buyer or retailer will usually ask to see
- US FDA registration and process filingFood Canning Establishment (FCE) registration on Form FDA 2541, then process filing on Form 2541d (low-acid retorted), 2541e (acidified), 2541f (water activity or formulation control) or 2541g (low-acid aseptic), each carrying a Submission Identifier (SID) — required under 21 CFR 108.25 and 108.35 before low-acid or acidified product enters the United States, with process control to 21 CFR 113 and 114
- APEDA registrationExport registration for scheduled products, alongside the health and phytosanitary certificates a destination market asks for
- Halal and KosherCertification routes where the destination market or the buyer requires them
We develop and validate the product and the process. The regulatory classification of your product, and the evidence behind its intended-use statement, are decided market by market — tell us where you are selling and we will tell you what the file has to contain.
Condition-specific formulation work: dysphagia and texture-modified nutrition, recovery and convalescence, sarcopenia and muscle loss and oncology nutrition support.
Questions
Clinical and medical nutrition, specifically
Should this product be retorted at all?
Sometimes not, and we will say so. Retort is the right answer for meals, purees, semi-solids and particulate-bearing products that need ambient shelf life. For a thin, heavily vitamin-fortified drinkable product, aseptic processing is often the better route — a retort cycle costs roughly four times as much vitamin C and twice as much thiamine as an aseptic one for the same product. Where the format suits retort, it wins on capital cost, pack flexibility and the ability to carry solids.
Can a high-protein product survive a retort?
It depends on how the protein system is built rather than on the protein level alone. Above roughly eight to ten per cent total protein you are in the band where uncontrolled whey aggregation causes thickening, sedimentation and later gelation. Raising the casein fraction and pre-denaturing the whey under controlled heat and shear both move that limit. What the pilot establishes is where your specific system sits.
How do you decide the overage on the vitamins?
By measuring, not by applying a published retention factor. We run the product on the actual cycle in the actual pack, analyse the finished product, and establish what each declared nutrient lost. That gives the processing retention. A stability programme then gives the storage loss, and the overage is set so the declaration still holds at the end of shelf life inside its tolerance band.
Why can the nutritional analysis not be calculated from the recipe?
Because the regulated object is the product as consumed, not the formulation. Processing moves protein quality, vitamin content and sometimes texture, and the losses are large enough to take a recipe-calculated declaration outside its tolerance well before the end of shelf life. A declaration that has never been measured on processed product is not a declaration, it is an estimate.
Total protein came back on specification. Is the protein quality fine?
Not necessarily. A nitrogen method cannot see blocked lysine, and neither can acid hydrolysis — the lysine is still there, it is simply no longer available. Assessing delivered protein quality after a retort needs available-lysine, furosine or digestibility work alongside the total-protein number.
Can you hold a texture-modified product at a specified consistency?
The consistency has to be engineered to land there after the cycle, not before it. Native starch gelatinises, breaks down under sustained heat and then retrogrades in storage; heat- and shear-stable gums hold far better. Because the level is assessed on the finished product, the target is set and then verified post-process and again across shelf life.
Do you make Foods for Special Medical Purposes?
We develop and pilot-manufacture the product, and we validate the thermal process and the delivered nutritional profile that an FSMP file rests on. Whether your product is classified as an FSMP, a medical food, a food for special dietary use or a conventional fortified food is a market-by-market regulatory question, and the classification changes both the composition rules and what the label may say. We will tell you what the evidence supports.
Can you support the clinical evidence behind the product?
Clinical validation sits alongside the formulation work rather than after it — Food Research Lab runs clinical trial management as a service, including glycaemic index testing, sensory and satiety research and post-market studies. Where an intended-use statement or a claim has to be substantiated, the study design and the product development are scoped together.
What batch size do you run?
Our pilot retort takes 6 kg per cycle, roughly 20 pouches at 300 g. That is enough to run the post-process nutritional analysis across several pack formats, pull stability samples and still have product for a sensory panel.
Do you offer contract manufacturing at volume?
Our retort is a pilot and development unit, not a commercial line. We prove the product and the process, then hand the validated scheduled process, the retention data and the documentation to a co-packer, co-manufacturer or your own plant for production at volume.
Can you supply on a private label or contract manufacturing basis?
Our retort in Chennai is a pilot and development unit rather than a commercial line. We prove the product and the process, then transfer the validated scheduled process and documentation for production at volume — private label, white label, own label, OEM, third party manufacturing, toll manufacturing, co-packing or co-manufacturing, with your co-packer or one we introduce. Bulk supply arrangements, pack formats and minimum order quantities are agreed with the manufacturing partner rather than set by us.
What does an export file need?
It depends on the destination. The United States regulates thermally processed low-acid foods under 21 CFR 113 and acidified foods under 21 CFR 114, with an establishment registration and a scheduled process filed with the USFDA; the European Union applies food information and labelling under Regulation (EU) 1169/2011, with EFSA governing claims; India works to FSSAI licensing and product standards. We produce the scheduled process, heat penetration data, shelf life testing results and the certificate of analysis that sit underneath all three.
More on the process and the machine on the pilot retort processing page
Related retort categories:
Next step
Send us the profile the product has to hit
Send the target nutritional profile, the format you have in mind and the market you are selling into. We will tell you what a retort cycle is likely to cost each declared nutrient, where the protein and texture risk sits, whether another process would serve the product better, and what the pilot would need to cover.
- 1Send the profile and the formatEven a target specification and a bench-scale recipe is enough to start.
- 2We come back within two working daysWith what the cycle will do to it and where the risk sits.
- 3You get a scoped quotePriced on the work the product actually needs.
Let’s create something Innovative and Delicious together
Food Research Lab strives for excellence in new Food, Beverage and Nutraceutical Product Research and Development by offering cutting edge scientific analysis and expertise.
