A clear beverage can look simple.

Water, flavor, acid, sugar, perhaps some fruit pulp or functional ingredients.

But once insoluble particles are added, keeping the beverage uniform during storage becomes much more difficult.

The particles may slowly settle to the bottom. Some may float. Others may form a layer near the surface. After weeks or months of storage, the bottle can look completely different from the day it was filled.

The obvious solution is to increase viscosity.

But that creates another problem.

Nobody wants a clear fruit drink to feel like a thick sauce.

This is where gellan gum has a particularly interesting role.

At very low concentrations, gellan gum can create a weak three-dimensional network throughout the liquid. The network may be strong enough to slow particle movement while contributing relatively little to the overall viscosity of the beverage.

That is why low-acyl gellan gum is widely investigated for clear suspension beverages.

For beverage applications, gellan gum can help maintain a stable suspension while keeping the drink relatively clear and low in viscosity.

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🔬 Why Do Particles Settle in the First Place?

A particle suspended in a beverage is constantly affected by gravity.

If the density of the particle is different from the surrounding liquid, the particle tends to move.

The larger the particle, the greater the problem can become.

Fruit pulp, aloe vera pieces, basil seeds, chia seeds, coconut pieces, mineral particles, and other insoluble ingredients can therefore create stability problems.

There are several possible outcomes:

⬇️ Sedimentation

Particles move toward the bottom.

⬆️ Creaming or flotation

Particles move toward the surface.

🔄 Aggregation

Small particles join together and become larger particles that settle more quickly.

⚠️ Phase separation

The beverage develops visible layers or an uneven appearance.

Simply shaking the bottle may temporarily solve the problem.

But it does not solve the underlying formulation issue.

The objective is to create a system that can maintain particle distribution during storage.

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💧 Why Not Simply Increase Viscosity?

This is one of the most important ideas in beverage stabilization.

If a liquid becomes more viscous, particles generally move more slowly.

So why not simply add a lot of xanthan gum, CMC, starch, or another thickener?

Because beverage texture matters.

A clear drink may need:

• Low viscosity
• Clean mouthfeel
• Good flavor release
• Easy pouring
• Good appearance
• Long-term suspension stability

A highly viscous drink may suspend particles very well but no longer feel like the product consumers expect.

Gellan gum offers another approach.

Instead of making the entire beverage dramatically thicker, it can form a weak, dispersed network that helps support suspended particles.

This is sometimes described as a fluid gel or suspension network.

The important point is:

> The beverage does not need to become thick everywhere in order to become stable.

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🧬 How Does Gellan Gum Create This Suspension Network?

Gellan gum is a microbial polysaccharide that can form structured networks when properly hydrated and cooled.

The basic process can be simplified as:

Hydration → molecular dispersion → chain association → network formation

When gellan gum is fully hydrated at high temperature and then exposed to appropriate cooling and ionic conditions, the polymer chains can organize into a three-dimensional structure.

The resulting network can interact with suspended particles.

Instead of allowing every particle to move freely through the beverage, the network provides resistance to movement.

This can dramatically slow sedimentation.

The amount of gellan gum required can be surprisingly small.

Commercial beverage systems commonly investigate dosage levels in the range of roughly 0.01–0.03%, although the optimum level depends heavily on the formulation and the specific gellan gum.

That means a beverage may contain only a few grams of gellan gum per 100 kg of finished product.

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🥤 Why Low-Acyl Gellan Gum Is Often Used

For transparent suspension beverages, Low Acyl (LA) gellan gum is commonly considered because it can produce strong suspension effects at low concentrations without creating the high bulk viscosity associated with conventional thickeners.

This makes it particularly interesting for:

• Clear fruit drinks
• Juice beverages
• Flavored water
• Aloe vera drinks
• Basil seed drinks
• Chia seed beverages
• Coconut-based clear drinks
• Beverages containing fine insoluble particles

The goal is not to create a visible gel.

The goal is to create a very weak structure throughout the liquid.

That structure can be difficult to see but important enough to keep particles from rapidly moving.

This is why a well-formulated gellan beverage can remain visually clear while still showing significant suspension stability.

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🌿 What About High-Acyl Gellan Gum?

High-acyl (HA) gellan behaves differently.

HA generally forms softer and more elastic structures, while LA produces firmer and more brittle gels.

This difference becomes important when the beverage itself has a more substantial body.

HA can be considered for:

• Fruit nectars
• Smoothies
• Plant-based beverages
• Protein-containing drinks
• More viscous beverage systems

In these products, the target may not be a completely transparent suspension.

Instead, the formulation may need a soft, smooth, elastic structure.

So the choice between HA and LA should not be based simply on which one has “stronger” gel strength.

The better question is:

> What type of structure does the beverage actually need?

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⚗️ The Role of Ions

One of the most important differences between gellan gum and many other beverage stabilizers is its response to ions.

Cations such as:

• Ca²⁺
• Mg²⁺
• K⁺
• Na⁺

can influence the organization of the gellan network.

This can be useful because the network needs to have enough structure to suspend particles.

But it can also become a source of formulation problems.

If the ionic environment is not controlled, the gellan may hydrate differently, gel prematurely, or create an uneven network.

This is particularly important for beverages containing naturally occurring minerals or added calcium.

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🧪 Calcium Can Be Helpful — and Difficult

Calcium is a good example.

In an LA gellan system, calcium ions can promote network formation.

That can be useful for suspension.

But if calcium becomes available too early, the gellan may begin interacting before it has been completely hydrated.

This can produce poor dispersion and an uneven structure.

That is why the order of addition matters.

A practical approach is generally:

First hydrate the gellan → then introduce the desired ionic environment.

Some commercial gellan systems specifically recommend adding calcium salts only after the gellan has been properly dissolved.

This is a small processing detail, but it can make a major difference in the final beverage.

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🌡️ Hydration Temperature Is Critical

Gellan gum needs sufficient heat to hydrate properly.

For beverage applications, processing temperatures around 85–90°C or higher are commonly used depending on the formulation and grade.

The important point is that simply dispersing gellan gum into cold water does not mean the polymer has been fully hydrated.

A typical process might look like:

Step 1 — Dispersion

Disperse gellan gum uniformly in the water phase.

Step 2 — Heating

Heat the system sufficiently to hydrate the polymer.

Step 3 — Complete hydration

Maintain adequate mixing and temperature so the polymer is fully dispersed.

Step 4 — Formulation

Introduce the remaining ingredients according to the process design.

Step 5 — Cooling

Allow the gellan structure to develop under controlled conditions.

Step 6 — Filling / Pasteurization

Complete the appropriate thermal process for the beverage.

The exact sequence can change depending on the ingredients and equipment.

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⚠️ Why Poor Hydration Causes “Gellan Gum Problems”

A common reaction when a beverage separates is:

> “We need more gellan gum.”

Not necessarily.

The actual problem may be incomplete hydration.

If part of the gellan gum remains poorly hydrated, the effective concentration of functional polymer in the continuous phase is lower than expected.

The result can be:

• Weak suspension
• Uneven network
• Sedimentation
• Visible particles
• Inconsistent batch-to-batch performance

Increasing the dosage may partially compensate for the problem, but it does not fix the underlying processing issue.

This is why hydration should be checked before simply increasing dosage.

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🧪 pH Also Matters

Beverage formulations often have acidic pH.

Fruit drinks, flavored waters, and juice beverages may operate in the pH range of roughly 3–4.

Gellan gum can work in acidic beverage systems, but HA and LA should not be treated as identical.

HA gellan generally has a narrower practical working range in acidic beverages, while LA is often favored for low-pH clear suspension systems.

For example, one beverage application study used LA gellan in an acidic fruit system around pH 4.1, while other commercial beverage systems target even lower pH values.

The important point is that pH should be evaluated together with gellan type, ion concentration, and processing conditions.

There is no universal “best pH” for every gellan gum beverage.

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🍊 Clear Fruit Beverages

Fruit beverages are one of the most obvious applications.

Fruit pulp contains insoluble particles with different sizes and densities.

Without stabilization, gravity gradually separates them from the liquid.

A low-acyl gellan network can slow this movement while maintaining a relatively clear appearance.

This is particularly attractive for products containing:

🍊 Citrus pulp
🥭 Mango particles
🍓 Fruit pieces
🌿 Aloe vera
🌱 Basil seeds
🌾 Chia seeds
🥥 Coconut particles

The exact formulation depends on particle size and concentration.

A beverage containing very fine particles may require a different system from one containing large fruit pieces.

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🍵 Clear Tea Beverages

Tea beverages can create a slightly different problem.

Tea extracts may contain fine particles and components that change the physical stability of the beverage during storage.

Gellan gum can be used at low concentrations to create a more stable suspension without turning the tea into a thick drink.

For example, a practical screening approach might test several low-acyl gellan levels such as:

• 0.010%
• 0.015%
• 0.020%
• 0.025%

and compare:

Sedimentation + clarity + viscosity + mouthfeel + flavor release

rather than choosing the highest dosage automatically.

This is a much better way to optimize a beverage.

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🥛 Calcium-Fortified Beverages Are More Complicated

Calcium-fortified beverages can be especially challenging.

The calcium added for nutritional purposes may not be completely soluble.

Particles can therefore settle if the system does not provide sufficient suspension.

At the same time, calcium itself can interact with gellan gum.

This creates a formulation problem:

The ingredient you want to add for nutrition can also affect the stabilizer.

For these systems, the type of gellan, calcium salt, concentration, pH, and processing order all need to be considered together.

Some specialized high-acyl gellan systems have also been developed specifically to improve colloidal stability in calcium-containing beverages, illustrating how important the interaction between calcium and gellan structure can be.

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🔬 Gellan Gum Does Not Always Work Alone

Another important point is that gellan gum does not have to be the only stabilizer.

Some beverage systems benefit from combinations of hydrocolloids.

For example, research on cloudy ginkgo beverages found that a combination of microcrystalline cellulose (MCC) and a small amount of gellan gum improved physical and thermal stability more effectively than either component alone under the study conditions.

This is a useful reminder that formulation is not always about finding one “magic” hydrocolloid.

Different materials can perform different jobs.

For example:

Gellan gum → suspension network

Cellulose → particle structure / body

Other hydrocolloid → viscosity or texture adjustment

The best system depends on the beverage.

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📊 How Much Gellan Gum Should Be Used?

There is no single dosage that works for every beverage.

However, clear suspension beverage applications often operate at very low concentrations.

A practical development range might begin around:

0.01–0.03% LA gellan gum

and then be adjusted based on the actual beverage system. Commercial application guidance also commonly falls within this general range.

For a 1,000 kg beverage batch:

Dosage	Gellan Gum
0.010%	100 g
0.015%	150 g
0.020%	200 g
0.025%	250 g
0.030%	300 g

These numbers are starting points for trials, not universal commercial formulas.

The correct dosage should be determined using the actual beverage ingredients and required shelf life.

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🧪 Why Starting Low Makes Sense

With gellan gum, adding more is not always the best solution.

Suppose a beverage is unstable at 0.015%.

You could immediately increase it to 0.05%.

But before doing that, it is worth asking:

• Was the gellan fully hydrated?
• Is the particle size too large?
• Is the pH appropriate?
• Is there too much calcium?
• Was the ion added at the right stage?
• Was the beverage homogenized properly?
• Did the thermal process damage the suspension system?
• Is the instability actually caused by the gellan system?

Only after these factors are checked does it make sense to increase dosage.

The best commercial formula is often the lowest gellan gum concentration that reliably achieves the required stability.

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⚙️ Processing Order Can Change the Result

Consider two processes.

Process A

Gellan + calcium → water → heating

Process B

Gellan + water → full hydration → calcium → cooling

These two processes may not produce the same structure.

If calcium interacts with incompletely hydrated gellan, localized gel formation can occur before the polymer is uniformly distributed.

That can produce a very different suspension system.

For this reason, process development should consider not only what ingredients are used, but also when each ingredient enters the system.

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🔄 What Happens During Storage?

A beverage that looks perfect immediately after production is not necessarily stable.

Suspension stability should be evaluated over time.

Useful observations include:

Day 1

Initial appearance and particle distribution.

Week 1

Early sedimentation or flotation.

One Month

Changes in viscosity and particle distribution.

Longer Storage

Permanent separation, aggregation, ring formation, or sediment compaction.

Thermal processing can also change the system.

A formulation may appear stable before pasteurization but become unstable afterward.

Research on cloudy beverages has shown that thermal treatment can alter particle size, zeta potential, viscosity, and overall stability.

So stability before heating is not enough.

The final product needs to be tested after the complete manufacturing process.

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👀 Clarity Is Part of the Formulation

For a clear beverage, suspension performance is only half the requirement.

The product must also look clear.

This is where LA gellan can be particularly attractive.

A conventional thickener may suspend particles by dramatically increasing the viscosity of the continuous phase.

But the drink can become visibly cloudy or heavy.

A low-dose gellan network can provide suspension while maintaining relatively low apparent viscosity and high transparency.

That combination is one of the reasons gellan gum has become important in transparent suspension beverage systems.

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🧪 A Practical Development Strategy

For a new clear beverage, a simple trial program can be more useful than changing many variables at once.

Trial 1 — Gellan dosage

Test several low concentrations.

Trial 2 — Gellan type

Compare LA and HA where both are technically suitable.

Trial 3 — Ion level

Evaluate the effect of controlled calcium or other ions.

Trial 4 — pH

Test the actual intended pH range.

Trial 5 — Processing

Compare different hydration and cooling sequences.

Trial 6 — Storage

Observe the beverage under the expected shelf-life conditions.

This approach helps identify which variable is actually responsible for the stability problem.

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📌 Common Problems and What to Check

Problem	Possible cause
Pulp settles quickly	Insufficient network / unsuitable dosage
Beverage becomes too thick	Excessive gellan or unsuitable stabilizer system
Uneven gel formation	Poor hydration or premature ion interaction
Separation after pasteurization	Thermal instability or formulation interaction
Cloudiness	Ingredients, particles, or excessive structuring
Strong gel at the bottom	Localized ion concentration
Good initial stability but later sedimentation	Weak long-term network or particle aggregation
HA system becomes unstable at low pH	pH outside its practical working range
Calcium beverage becomes unstable	Calcium–gellan interaction not properly controlled

The important lesson is that sedimentation does not automatically mean “add more gellan.”

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🌱 The Real Advantage of Gellan Gum in Clear Beverages

The biggest advantage of gellan gum is not simply that it is a strong gelling agent.

It is the ability to create a structured liquid system at very low use levels.

That allows formulators to separate two properties that are often difficult to achieve together:

Suspension stability

and

low beverage viscosity

This is particularly valuable for modern beverages where consumers expect:

• Clear appearance
• Light mouthfeel
• Natural-looking ingredients
• Stable suspended particles
• Long shelf life
• Good flavor release

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🚀 Final Takeaway

Clear beverages are a good example of why hydrocolloid formulation is more complicated than simply increasing viscosity.

A successful gellan gum beverage depends on several factors working together:

🌿 Gellan type — HA or LA

🧪 Dosage — usually very low for clear suspension systems

💧 Hydration — sufficient heat and mixing are essential

⚗️ Ions — calcium and other cations can strongly affect the network

📉 pH — must be considered together with the gellan type

🌡️ Temperature — affects hydration, gelation, and thermal stability

⚙️ Processing order — can determine whether the network forms uniformly

🔄 Storage stability — must be evaluated after the complete manufacturing process

For many clear suspension beverages, the goal is not to make the liquid thick.

It is to create just enough invisible structure to keep the particles where they belong.

That is the real value of gellan gum in beverage stabilization.

📚 Selected References

1. Ni, Y., Tang, X., & Fan, L. Improvement in physical and thermal stability of cloudy ginkgo beverage during autoclave sterilization: Effects of microcrystalline cellulose and gellan gum. LWT, 2021.

1. Stability, physicochemical, rheological and sensory properties of beverage containing encapsulated jujube extract with sodium alginate stabilized by sodium alginate and Gellan gum. Food Chemistry Advances, 2023, 2, 100195.

1. Calcium stable high acyl gellan gum for enhanced colloidal stability in beverages. Patent literature describing calcium-stable HA gellan systems for beverage suspension.

1. Gelation of gellan – A review. Food Hydrocolloids, 2012, 28(2), 373–411.

1. Progress and opportunities in Gellan gum-based materials: A review of preparation, characterization and emerging applications. Carbohydrate Polymers, 2023, 311, 120782.