Gellan gum functions as a structuring and gelling agent in a
wide variety of foods. Typical examples are shown below. Although gellan gum can
be used alone effectively in many products, its benefits are sometimes better
realised in combination with other hydrocolloids.
Water-based dessert gels are
popular throughout the world and have a range of textures. Gellan gum can furnish
textural diversity in these products coupled with outstanding flavour release.
Small amounts of gellan gum can be used in gelatin desserts to improve heat
stability and raise the setting temperature so gels will set without refrigeration.
Gellan gum also improves the heat stability of other gelled products prone to melting
when exposed to high ambient temperatures.
Savoury gels or aspics sometimes
are used in specialty meat, fish and vegetable products to provide added appeal
and succulence. Gelatin usually is the gelling agent of choice. Again, gellan gum
can be used wholly or partly in place of gelatin to improve the characteristics
of the aspic.
In fruit-based products, gellan
gum offers robustness during processing, provides good product stability during
transportation and storage, and through its characteristic gel texture and
low-concentration requirement, creates products with excellent taste and appearance.
In fruit fillings for bakery products,
use of gellan gum can provide additional structure and reduction of starch levels.
The added structure, coupled with the ability of the pastes to partially recover
structure after shearing and depositing, results in fillings that retain water and
show good bakefastness.
Since high solids products such as gelled confections
are made by heating and cooling, gellan gum often can be used in their manufacture
without process modifications. By using gellan gum in combination with the appropriate
starch, it is possible to reduce the set time of starch jellies so they can be removed
more quickly from the starch moulds. Gellan gum can also be used to impart increased
heat stability to gelatin confections, resulting in products that store better at
high ambient temperatures.
In decorative icings, frostings and glazes
for baked goods, benefits obtained from gellan gum include good shelf stability,
moisture retention, spreadability, sheen, texture and flavour release.
Gellan gum can provide added benefits to beverages
by use of fluid gel technology. Gellan gum fluid gels are solutions with a weak gel structure
that provide good suspension at low viscosity.
On heating and cooling in milk,
gellan gum produces a delicately textured gel which can be beneficial in dairy products
such as crème brulées and yoghurts.
In South East Asia, texture is a very important characteristic and
desirable texture is as important as flavour. Drinking jellies
are very popular and gellan gum fluid gel technology is often used in these products.
Gellan gum forms films and coatings that offer several advantages, particularly
their ability to reduce oil absorption in products such as breadings and
batters for chicken, fish and vegetables.
The use of gellan gum in emulsions and cakes illustrates that it is not solely
a gelling agent but can also be used in applications where structure and stability, rather than
gel formation, are required.