Bespoke effervescent tablet and drink enhancer manufacturing

Effervescent tablets, granules and drink enhancers, made in Leicester

We make effervescent tablets, effervescent granules for stick packs and drink enhancers in-house in Leicester for premium wellness brands. As an effervescent tablet manufacturer, we build vitamin C, electrolyte and hydration, magnesium and calcium, and multivitamin and energy tablets, molecular hydrogen tablets for the US, and drink enhancers as liquid water flavour drops or single-serve drink powders. Each formula is designed around its base, its sodium and its moisture barrier, and each tablet batch's certificate of analysis reports effervescence time, water content, hardness, active content and sodium. Our Leicester facility, where we make every effervescent product, is ISO 9001, HACCP and GMP certified by BSI. Your formula is yours: our formula ownership page explains how.

Sodium is the format's main design point, because the classic base is sodium bicarbonate, and a 2025 review names daily exposure to large amounts of sodium as the main concern with effervescent tablets (Chatzidopavlaki and colleagues, RSC Pharmaceutics, 2025). EU sodium limits for supplements are not harmonised and national rules differ; EU maximum levels are under review, so we design EU formulas with a lower-sodium base ready.

Gram doses, and the sodium that comes with the base

An effervescent tablet is large, so it carries gram-level doses that a capsule cannot, but the base takes much of its weight. Neutralising 1 g of anhydrous citric acid takes about 1.31 g of sodium bicarbonate, which carries about 360 mg of sodium (calculated from IUPAC standard atomic weights), so sodium is designed, not discovered. Nutrient reference values are 80 mg for vitamin C, 375 mg for magnesium and 800 mg for calcium. Granules of the same blend fill single-serve sticks through our sachet and stick pack manufacturing, and hydration formulas can launch as a powder through our electrolyte supplement manufacturing.

Acid, bicarbonate and the water that spoils the fizz

Research and development is a paid stage, and it can be included with an order of the right size. Development runs in stages: bench blends tested for fizz time, taste and sodium, compression trials, stability in the final pack at 40°C and 75% relative humidity, then a pilot batch that fixes the process settings for production.

The acid and bicarbonate reaction

In water, citric acid and sodium bicarbonate react to give sodium citrate, water and carbon dioxide: one molecule of citric acid neutralises three of bicarbonate, and 1 g of citric acid, fully reacted, releases about 0.69 g of carbon dioxide. The gas breaks the tablet apart. The ratio sets the taste: a slight acid excess gives a fresh, tart drink, while excess bicarbonate tastes salty and soapy. Tartaric, malic and adipic acids change sourness and solubility. Potassium bicarbonate, about 39% potassium, cuts sodium but adds bitterness; calcium carbonate, about 40% calcium, delivers a mineral and reacts more slowly.

Moisture: the reaction you do not want

The same reaction starts with a trace of water, and because it makes water, it feeds itself: the tablet swells, softens and loses its fizz, and vitamin C browns. Effervescent tablets therefore carry far less water than ordinary tablets, typically under 0.3% against about 2% (Stahl, Pharmaceutical Technology Europe, 2003). We make them in low-humidity rooms, use anhydrous acids (citric acid monohydrate carries about 9% water of crystallisation), hold raw materials and granules to a set water limit, and can add a little anhydrous sodium carbonate, which preferentially absorbs stray moisture (Chatzidopavlaki and colleagues, 2025).

Granulation and compression

Granulation gives the blend flow and strength. Wet granulation adds a very small amount of water to start a controlled pre-reaction that binds the particles before drying (Stahl, 2003). We use a dry route: the blend is compressed directly, or compacted and milled into granules, so no water enters the process. Effervescent tablets are large and hard to compress well: in one published development study, most formulations failed the friability test (Rosch and colleagues, Pharmaceuticals, 2021). We tune granule size, blend and compression force until the tablet survives packing, dissolves on time and stays stable.

Lubricants and a clear drink

Magnesium stearate, the usual tablet lubricant, is insoluble in water and leaves a film on the drink, so effervescent tablets use water-soluble lubricants such as L-leucine with polyethylene glycol (Stahl, 2003), sodium stearyl fumarate or adipic acid (Rosch and colleagues, 2021). Sodium benzoate also lubricates, but it adds sodium. Fillers such as sorbitol and mannitol dissolve fully; above 10% added polyols, UK and EU labels need a laxative-effect statement.

Dissolution time and flavour

The European Pharmacopoeia's test drops one tablet into 200 ml of water at 15 to 25°C; the tablet passes when gas stops evolving and no agglomerates remain, within 5 minutes for each of six tablets. Brands want faster, so we set a target for your customers' glass and water temperature. Flavour is built with the base, not after it. Sucralose is about 600 times as sweet as sugar, acesulfame K about 200 times and steviol glycosides 200 to 400 times (FDA), so tiny amounts carry sugar-free formats, and our flavour and taste masking team balances salt, sour and bitter at full dose.

Molecular hydrogen tablets

Hydrogen tablets are effervescent tablets with a different reaction: elemental magnesium reduces the acid's hydrogen ions to hydrogen gas, leaving a magnesium salt in the drink (Rosch and colleagues, 2021). In that study, the fastest formulation released more than 80% of its theoretical hydrogen within 100 seconds, but tablets gained weight in humid storage and slowed as magnesium hydroxide coated the metal, so moisture-proof packs matter even more. Chemistry also limits what reaches the glass: 100 mg of magnesium can release up to about 8.3 mg of hydrogen, yet water holds only about 1.6 mg per litre at 25°C even under pure hydrogen at 1 bar (NIST Chemistry WebBook), so in a typical glass most of the gas bubbles away. Labels should state what the tablet contains, not an unmeasured dissolved hydrogen figure.

Drink enhancers

Drink enhancers flavour and fortify water without a tablet: liquid concentrates, which shoppers know as water flavour drops, and single-serve drink powders. Concentrates are acidic, preserved systems: sorbic acid, benzoic acid and their salts work at low pH, and EU and GB additive rules allow them in liquid food supplements other than syrups up to a combined 2,000 mg per litre. Concentrates with vitamin C use sorbate, because benzoate and ascorbic acid can form trace benzene. A drink enhancer can sell as a food or a food supplement, which changes the label, claims and additive rules, so classification comes first.

Soluble actives at doses of hundreds of milligrams

Effervescent tablets suit soluble actives taken at doses of hundreds of milligrams or more.

Moisture-sensitive actives such as probiotics, and actives that need a slow release, sit better in capsules and tablets, and people who prefer to chew choose gummies. Effervescent tablets turn a pill into a drink, and Nutrition Business Journal data show non-pill formats rising from 37% of US supplement sales in 2013 to 56% in 2021 (reported by NutraIngredients, January 2026). Our supplement formats overview compares every option.

How we keep humidity out as an effervescent tablet manufacturer

Our HACCP study for each product type, reviewed annually, sets the critical control points.

1. Approve and receive. Acids, bicarbonates and actives come from suppliers approved before use and reviewed each year, with water content checked on each certificate of analysis.
2. Control the room. Production runs at low relative humidity, monitored and recorded through the batch.
3. Weigh and dispense. Materials are weighed against the batch record under our allergen management plan with yellow colour coding.
4. Granulate dry. The acid and base are compacted and milled into granules without water, and water content is checked by loss on drying.
5. Blend. Actives, flavours and sweeteners are blended in, with the lubricant added last.
6. Compress. Tablets are checked in process for weight, thickness, hardness and disintegration time.
7. Pack at once. Tablets go straight into tubes with desiccant closures or into foil strips, in the same low-humidity room.
8. Label 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 each batch against its specification.

Drink enhancer concentrates follow our liquid route: acids, flavours, sweeteners and preservatives are dissolved in a set order, pH and Brix are checked in process, and the concentrate is filled into squeeze bottles with dosing closures. The first production batch of every new product is checked against the pilot batch before release: fizz time, hardness, taste and sodium for tablets; pH, Brix and taste for concentrates.

Fizz time, water content and sodium, tested before release

Every batch is tested by accredited partner laboratories (ISO/IEC 17025), and batch testing is part of every order. Quality control releases every batch against its specification, and nothing is dispatched without quality control sign-off. Our testing and batch release page explains each method.

Stability studies follow ICH Q1A(R2) conditions, including 40°C and 75% relative humidity, in the final pack, tracking fizz time, hardness, water content, vitamin C and colour. Overages keep each added vitamin within the EU tolerances throughout shelf life and at or above the declared amount on US labels.

For effervescent tablets, each batch's certificate of analysis reports effervescence time, water content, hardness, active content, sodium, heavy metals and microbiology against the specification. From development, you also receive the formula, specification, sodium calculation, process summary, stability data and a label and claims review for each market.

Our credentials: ISO 9001, HACCP and GMP certified by BSI, and FDA registered. BRCGS implementation under way, certification expected in early 2027.

Keeping water out of every pack for the whole shelf life

The pack keeps water out for the whole shelf life.

• Tubes: polypropylene or aluminium, with silica gel or another drying agent in the closure (Stahl, 2003).
• Foil strips and blisters: aluminium, which has low water permeability, for single tablets on the go.
• Sticks and sachets: high-barrier laminates for effervescent granules and drink powders.
• Bottles: squeeze bottles for liquid drink enhancers.

We confirm each pack's moisture barrier with permeation testing to USP <671> and stability in the final pack. Closures are tamper evident, and every tube, strip and bottle carries its batch code and best before date.

EU rules require recyclable packaging from 2030 at the earliest, so we favour mono-material polypropylene tubes and recyclable aluminium over mixed laminates.

Sodium, sweetener and hydration claim rules on the label

We prepare products and documents for the UK, the EU and the US; the rules below are as of October 2026.

United Kingdom and European Union

The Food Supplements (England) Regulations 2003 and the EU's food supplement rules require the name "food supplement" and the standard statements on daily portion, varied diet and storage away from young children; many EU states also require notification. Food supplements need no full nutrition declaration, but the amount of each vitamin and mineral present is declared in numerical form, and sodium is a listed mineral, so we declare sodium per daily dose. Sweetened tablets state "with sweetener(s)", and caffeine tablets carry the caffeine statement for food supplements, with the caffeine per daily portion. A drink enhancer sold as a food carries a full nutrition declaration, with salt shown as sodium multiplied by 2.5.

Claims come from the GB register and the EU register. The carbohydrate-electrolyte hydration claims need 80 to 350 kcal per litre from carbohydrates and 460 to 1,150 mg of sodium per litre, so a sugar-free tablet relies on mineral and vitamin claims such as "Magnesium contributes to electrolyte balance" and "Vitamin C contributes to the protection of cells from oxidative stress", each from at least a source of the nutrient. No health claim for molecular hydrogen is authorised, and UK and EU food supplements can use magnesium only in the permitted forms, none of which is the metal, so for GB and EU ranges we build a hydration tablet or drink enhancer instead.

United States

A US label states "dietary supplement" and carries a Supplement Facts panel, which must declare sodium once a serving contains 5 mg or more, against a Daily Value of 2,300 mg. Structure/function claims need FDA's disclaimer and a notification to FDA, and the FTC expects competent and reliable scientific evidence, generally randomised controlled human trials. Hydrogen tablets are sold as US dietary supplements, with magnesium declared "as elemental magnesium" (NIH Dietary Supplement Label Database), and we test hydrogen yield on every batch. We are an FDA registered food facility for dietary supplements. When your effervescent product is ready to brief, Start your project.

References: European Pharmacopoeia, Tablets monograph (2026); Stahl, Effervescent dosage manufacturing, Pharmaceutical Technology Europe (2003); Chatzidopavlaki and colleagues, recent advances in the technology of effervescent tablets, RSC Pharmaceutics (2025); Rosch and colleagues, an effervescent hydrogen-generating tablet, Pharmaceuticals (2021); Directive 2002/46/EC (2002); Regulation (EU) No 1169/2011 (2011); Regulation (EU) No 432/2012 (2012); 21 CFR Part 101 (2026).