Bespoke protein bar and snack manufacturing
British VitaTech is a UK protein bar manufacturer that develops and makes custom protein bars and snacks for brands worldwide, from formulation to finished product, and the brand owns the formula.
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Cold-formed, coated and baked bars, plus bites and protein crisps
Custom and private label protein bars and snacks are what we develop and make as a protein bar manufacturer for premium wellness brands: cold-formed, layered, coated and baked bars, protein cookies, bites, clusters, crunchy protein crisps and protein confectionery. We make every bar and snack at our Leicester facility, which is ISO 9001, HACCP and GMP certified by BSI. We set the protein system, binder, coating, pack and testing plan with you, and build each recipe to the protein and fibre claims you want on the label. Every batch is tested by accredited partner laboratories, and quality control releases every batch against its specification. Your formula is yours.
| Product | How it is built | What shapes the recipe |
|---|---|---|
| Cold-formed protein bars | Protein bound with syrups, fats and humectants, formed and cut without baking | Softness through shelf life; water activity |
| Layered and coated bars | A protein core with caramel or crisp layers, enrobed in chocolate or a compound coating | Moisture moving between layers; coating bloom |
| Baked bars and protein cookies | Protein with oats or flour and fat, baked to a soft or crisp bite | Browning of protein and sugars; dryness |
| Bites, balls and clusters | Nut, seed or date bases with protein, rolled, or crisps bound into clusters | Stickiness; keeping the crunch |
| Crunchy protein crisps and puffs | Extruded protein and starch, savoury or sweet, as a snack or an inclusion | Expansion falls as protein rises |
| Protein confectionery | Protein chocolate, coated crisps and wafers | Sugar and polyol choice; coating texture |
Demand for high protein snacks reaches far beyond sport: 70% of US adults say they actively try to consume protein, up from 59% in 2022 (IFIC research, reported by New Hope Network, May 2026).
Dose follows the claim. As of October 2026, in the UK and EU, a bar is a "source of protein" when at least 12% of its energy comes from protein, and "high protein" at 20% (Regulation (EC) No 1924/2006): a 230 kcal bar needs at least 6.9 g and 11.5 g of protein respectively. "Source of fibre" needs at least 3 g per 100 g or 1.5 g per 100 kcal, and "high fibre" twice that. We also make protein gummies through our gummy manufacturing, and the same protein systems go into powders and drink mixes and sachets and stick packs.
Why bars harden, and how a protein bar manufacturer keeps them soft
Protein blends and hardening over shelf life
Protein bars harden in storage through three mechanisms. Proteins and syrups separate into phases, which McMahon and colleagues (2009) propose starts the hardening: bars made with intact whey protein isolate hardened to almost 100 N in accelerated storage, against 10 to 15 N with partially hydrolysed isolate. Reducing sugars react with protein, and with longer storage the modified proteins form large polymers that toughen the bar; replacing reducing sugars with sugar alcohols minimised the change (Zhou and colleagues, 2013). Water also moves: in a milk protein bar, changes in microstructure driven by moisture migrating towards sugars and humectants appeared to matter more than chemical reactions (Loveday and colleagues, 2009).
So we design softness in: a blend of intact and hydrolysed proteins, a binder matched to the protein, and hardness tracked by texture analyser through stability testing. Pea blended with rice lifts a plant bar's amino acid score, as our protein powder manufacturing page explains.
Binders, syrups and polyols
The binder holds the bar together, sweetens it and controls how much water can move. Glucose and fibre syrups, nut butters, fats and glycerol share the job, and the binder to protein ratio sets the texture. Polyols such as maltitol replace sugar without Maillard browning, because they are not reducing sugars. In GB and the EU, sugars exclude polyols, which count at 2.4 kcal per gram (erythritol at zero); glycerol, with three hydroxyl groups, meets the legal definition of a polyol. Bars with sweeteners carry "with sweetener(s)", and more than 10% added polyols brings "excessive consumption may produce laxative effects", so we calculate every formula's polyol share before the first bench sample, check the polyol content of every label and apply the statement wherever the rules require it, as part of our sugar reduction and clean label work.
Water activity
FDA notes that most foods have a water activity above 0.95, enough for bacteria, yeasts and moulds to grow, while protein bars are formulated to 0.65 or below (Loveday and colleagues, 2009) and are sold at ambient temperature. Water activity also shapes texture: moisture moves from a wetter dough into a drier crisp, which goes soft, so we match layers and inclusions or seal crisps with fat. Every formula gets a water activity limit, checked on every batch.
Coatings
Real chocolate is tempered so cocoa butter sets in its stable crystal form, giving snap, gloss and resistance to bloom; most compound coatings, built on other vegetable fats, set without tempering. In the UK and EU, a coating sold as chocolate may contain no more than 5% vegetable fats other than cocoa butter, so compound coatings carry another name. Coatings add saturated fat and sugar, so we use thinner coats, bottom coats, drizzles and polyol-sweetened coatings.
What goes into a bar, from whey to cocoa coatings
| Ingredient | Why it works in a bar | What we watch |
|---|---|---|
| Whey, milk proteins and casein | High protein quality and dairy flavour | Hardening; lactose browns with protein in warm storage |
| Soy, pea and rice proteins and crisps | Vegan bars and crunch | Amino acid balance; earthy notes; heavy metals |
| Collagen peptides | Protein grams and a chewy bite | No tryptophan, so no gain in protein quality |
| Soluble fibre syrups, inulin and polydextrose | Bind with less sugar; fibre claims | In the US, only fibres FDA recognises count as dietary fibre |
| Maltitol, sorbitol, erythritol and glycerol | Bulk, sweetness and water binding | Laxative statements; tolerance |
| Nuts, nut butters, seeds and oats | Flavour, texture and a food-first label | Allergens; rancidity; the UK's less healthy food rules |
| Cocoa, chocolate and compound coatings | Taste and finish | Saturated fat; bloom; cadmium from cocoa |
| Creatine, vitamins and minerals | A second benefit | Creatine turns into creatinine in moist products, faster as pH falls and temperature rises |
Extruded or sheeted, then cut, coated and flow-wrapped
We make every bar and snack in Leicester, as we do all our supplement formats, under a HACCP study for each product type, reviewed annually.
- Approve and receive. Suppliers are approved before first use and reviewed each year, and every certificate of analysis is checked against our specification.
- Weigh and dispense. Against the batch record, under our allergen management plan with yellow colour coding for milk, soy, nuts and peanuts.
- Prepare the binder. Syrups, fats and humectants are heated and mixed to a set temperature and solids, checked by refractometer.
- Mix. Proteins, fibres and inclusions go in a set order, with mixing time and dough temperature controlled so the protein hydrates evenly and crisps stay whole.
- Form. Bars are extruded through a die or sheeted into a slab, with caramel and crisp layers added in turn; bites are rolled, clusters bound, and baked bars and cookies deposited and baked.
- Cool, cut and coat. The rope or slab sets in a cooling tunnel, is cut and checkweighed, then enrobed, bottom-coated or drizzled and cooled again.
- Wrap and inspect. Bars are flow-wrapped with a batch code and best-before date, seals are checked, and every bar passes metal detection or X-ray inspection, a critical control point.
- Label, retain and release. Label verification on every batch is our critical control point, CCP-01. We keep three retained samples per batch for shelf life plus one year, and quality control releases every batch against its specification.
Crunchy protein crisps are made by extrusion cooking: protein and starch cook under heat and pressure and puff at the die as superheated water flashes to steam. More protein tends to make extruded snacks denser and harder (Luo, Paliwal and Koksel, 2024), so the protein to starch ratio, moisture and die conditions set the crunch before drying. A full mock recall, forward and backward with mass balance, runs in seconds.
From the nutrition panel to hardness over shelf life
Every batch is tested by accredited partner laboratories (ISO/IEC 17025), and batch testing is part of every order. Nothing is dispatched without quality control sign-off, and our testing and batch release page explains each method.
| Test | Typical method | Why it matters in a bar |
|---|---|---|
| Protein and amino acids | Kjeldahl or Dumas nitrogen; HPLC amino acid profile | Protein claims; catches spiking with cheap amino acids |
| Nutrition panel | Fat and saturated fat, sugars and polyols by chromatography, fibre by AOAC methods, salt | Label, claims and the nutrient profile score |
| Water activity and moisture | Water activity meter and moisture analysis | Texture and microbial stability |
| Microbiology | Total viable count, yeasts and moulds, Enterobacteriaceae, Salmonella | Salmonella can survive for long periods in dry ingredients such as nuts, cocoa and powders |
| Allergens | ELISA for gluten, milk or peanut where a claim depends on it | A gluten-free claim allows no more than 20 mg/kg of gluten |
| Heavy metals | ICP-MS for lead, cadmium, mercury and arsenic | Plant proteins and cocoa can carry metals taken up from soil |
| Stability | Real-time and accelerated storage in the final pack | Tracks hardness, water activity, browning, rancidity and bloom, and sets shelf life |
Stability and shelf life testing runs on every new formula, with sensory checks at each time point. Informed Sport, vegan, halal or kosher certification is arranged for your product. Our credentials: ISO 9001, HACCP and GMP certified by BSI, and FDA registered. For retail buyers: BRCGS implementation under way, certification expected in early 2027.
Flow wraps, cold seal and nitrogen-flushed snack bags
The wrapper is part of the shelf life: a protein bar must not dry out, a crisp snack must not pick up moisture, and nuts and cocoa butter need protecting from oxygen and light. We specify films with water vapour and oxygen transmission data (ASTM F1249 and D3985) and confirm shelf life in the final pack.
- Flow wraps: metallised films give high barrier with little material, while mono-material polypropylene films with barrier coatings are designed for recycling and need their own sealing conditions.
- Cold seal: chocolate-coated bars are wrapped in cold-seal films that seal by pressure, not heat, protecting the coating.
- Snack packs: crisps and clusters go into nitrogen-flushed barrier bags, which slow rancidity and protect the crunch.
Every film comes with its supplier's declaration of compliance for food contact. As of October 2026, UK packaging fees are higher for packs that are hard to recycle, and EU packaging must be designed for recycling from 2030 at the earliest, so new bars start in recyclable films where the barrier allows. Finished bars go out in shelf-ready display cases, multipacks or e-commerce outers.
High protein or source of protein: bar claims in each market
The rules below are as of October 2026. A protein bar is a food, not a food supplement, since supplements come in dose form such as capsules and sachets (Directive 2002/46/EC), so it carries a nutrition declaration per 100 g and the claims foods can make.
| Claim | UK and EU | US |
|---|---|---|
| Source of protein | At least 12% of energy from protein | "Good source": 10% to 19% of the 50 g Daily Value per reference amount, from protein corrected for quality (PDCAAS) |
| High protein | At least 20% of energy from protein | At least 20% of the Daily Value per reference amount, corrected the same way |
| Protein function claims | "Protein contributes to a growth in muscle mass"; "Protein contributes to the maintenance of muscle mass"; "Protein contributes to the maintenance of normal bones"; each needs at least a source of protein | Structure/function wording from nutritive value |
| Sugar-free | "Sugars-free": no more than 0.5 g of sugars per 100 g | Less than 0.5 g of sugars per serving, sugar-containing ingredients asterisked, "not a low calorie food" or similar unless the bar is low or reduced calorie, and sugar alcohols declared |
US labels also show "Includes X g Added Sugars" and carry "Excess consumption may have a laxative effect" where daily sorbitol intake could reach 50 g. Allergens are emphasised in UK and EU ingredient lists, and US labels declare the nine major allergens, sesame included. We label US bars as conventional foods, so every ingredient needs a food-use basis such as GRAS status, and we add the bar's food categories to our FDA registration before the first US order. Our claims and regulation page covers the detail.
The UK's less healthy food rules
A bar that scores below 4 on the government's nutrient profiling model keeps every promotion, shelf position and advert open, so we calculate the score from the first formula. At 4 or more, DHSC guidance places a protein bar with cereal, nuts or seeds among sweet biscuits and bars, and one with confectionery features among confectionery; extruded snacks are savoury snacks. Retailers with 50 or more employees cannot then sell it in multibuys or place it at checkouts, entrances or aisle ends in larger stores or online (England since 2022 for placement and 2025 for multibuys, Wales since March 2026, Scotland since October 2026), and businesses with 250 or more employees cannot advertise it on UK TV before 9pm or in paid online adverts (since January 2026). Food supplements are exempt under DHSC guidance; bars are foods.
The ultra-processed food debate
Most studies reviewed by the UK's Scientific Advisory Committee on Nutrition (SACN) used NOVA, under which a bar built on protein isolates, sweeteners and emulsifiers counts as ultra-processed (Monteiro and colleagues, 2019). SACN found the observed associations between higher consumption of (ultra-)processed foods and adverse health outcomes concerning, but noted that the evidence is almost exclusively observational and that it is unclear how far established nutritional relationships explain them (SACN, 2023). Ultra-processed is not a legal category for food labels in the UK, the EU or US federal law. Our answer: bars that earn their place on nutrition and read like food, with whole-food inclusions, fibre, less sugar and only the additives the texture needs.
Research and development is a paid stage that can be included with an order of the right size. Send your brief and a benchmark bar through Start your project, and we will come back with the protein system, texture plan and testing plan.
References: Regulation (EC) No 1924/2006 on nutrition and health claims (2006); Regulation (EU) No 1169/2011 on food information to consumers (2011); The Food (Promotion and Placement) (England) Regulations 2021 (2021); Department of Health, Nutrient profiling model technical guidance (2011); McMahon, Adams and McManus, Journal of Food Science (2009); Zhou and colleagues, Journal of Food Science (2013); Monteiro and colleagues, Public Health Nutrition (2019); SACN, Statement on processed foods and health (2023).
Where this is going
To 2030
Up: protein spreads across everyday foods, led by GLP-1 households
To 2036
Flat to up: protein becomes a baseline claim while bars face UPF scrutiny
What to watch
Ultra-processed food backlash and sugar and HFSS rules on bars and drinks
Questions brands ask
Can you make private label protein bars for my brand?
Yes. We develop and make custom and private label protein bars and snacks at our Leicester facility: cold-formed, layered, coated and baked bars, protein cookies, bites, clusters and crunchy protein crisps. We set the protein system, binder, coating, pack and testing plan with you, and every batch is tested by accredited partner laboratories. Your formula is yours, and research and development is a paid stage that can be included with an order of the right size.
Why do protein bars go hard, and how do you keep them soft?
Protein bars harden as proteins and syrups separate, as reducing sugars react with protein and as moisture migrates inside the bar. In one study, bars made with intact whey protein isolate hardened to almost 100 N in accelerated storage, against 10 to 15 N with partially hydrolysed isolate. We blend intact and hydrolysed proteins, use non-reducing binders such as polyols, set a water activity limit and track hardness by texture analyser through stability testing.
How much protein does a bar need for a high protein claim?
As of October 2026, a bar sold in the UK or EU is "high protein" when at least 20% of its energy comes from protein, and a "source of protein" at 12%. A bar providing 230 kcal therefore needs at least 11.5 g of protein to be high in protein. In the US, "high" means at least 20% of the 50 g Daily Value per reference amount, calculated from protein corrected for quality, so collagen-heavy blends score lower.
Can you make a sugar-free protein bar?
Yes. We replace sugars with polyols such as maltitol and soluble fibres, adding high-intensity sweeteners where the taste needs them. As of October 2026, a UK or EU "sugars-free" bar has no more than 0.5 g of sugars per 100 g and carries "with sweetener(s)", plus "excessive consumption may produce laxative effects" above 10% added polyols; we check the polyol content of every label. A US "sugar-free" bar has less than 0.5 g of sugars per serving and declares its sugar alcohols.
Do the UK's less healthy food rules apply to protein bars?
Only bars that score as less healthy. As of October 2026, a bar with cereal, nuts or seeds, or confectionery features, is in scope at 4 or more on the nutrient profiling model. Retailers with 50 or more employees cannot place it at checkouts or sell it in multibuys, and businesses with 250 or more employees cannot advertise it on TV before 9pm or in paid online adverts. Supplements are exempt, but bars are foods, so we design to the score you need.
Are protein bars ultra-processed foods?
Many are under NOVA, the classification most studies use, which counts protein isolates, sweeteners and emulsifiers as markers of ultra-processing. As of October 2026, ultra-processed is not a legal category for food labels in the UK, the EU or US federal law. UK scientific advisers found the observed links with adverse health outcomes concerning, with the evidence almost exclusively observational. We build bars that earn their place on nutrition: whole-food inclusions, fibre, less sugar and only the additives the texture needs.
How are your protein bars tested and released?
Every batch is tested by accredited partner laboratories (ISO/IEC 17025), and batch testing is part of every order. Tests cover protein and amino acids, the nutrition panel behind your claims, water activity, microbiology including Salmonella, allergens where a claim depends on them, and heavy metals. Every bar passes metal detection or X-ray inspection, labels are verified on every batch, we keep three retained samples per batch, and nothing is dispatched without quality control sign-off.
Start your project
Tell us what you want to make. Every project starts with a conversation about your product, your customers and your markets.