A Spoonful of What?
by Lori Dahm
Sweetener alternatives abound for possible sugar
reduction in products.
Creating dairy foods that have a reduced sugar quotient is a rapidly changing field today, thanks to the dénouement of the low-carb fad. However, although the Atkins diet may be falling by the wayside, consumers are still seeking products that offer a lowered sugar content.
Trends in the dairy case and frozen dessert aisle are
moving toward the “light” label, products that boast a
reduced-calorie load or fat content, or products billed as the newly
popular “no sugar added.”
But taking the sugar out of products is not a
straightforward proposition. For one, although options in high-intensity
sweeteners abound, current sentiment among consumers include taste
preferences that preclude some of these ingredients. Moreover, the movement
toward natural and organic products is diametrically opposed to high
intensity sweetener proliferation.
A new picture in the world of sweetener alternative
ingredients for dairy products is currently under development. Consumers
are looking for products that offer a reduction in calories, but they are
interested in exploring sweetener options to high-intensity ingredients
such as aspartame, acesulfame potassium and sucralose products.
As a result, sweetener alternatives such as the sugar
alcohols, or polyols, are being explored in full force, as well as new
natural products. Although using such sweeteners is not easy to navigate,
today’s demand for reduced calorie foods and healthier options is
being met by increased expertise from manufacturers, who are offering new
technologies and ingredients in sweetener alternatives that are filling the
gap, sometimes literally, in reduced-sugar formulations.
High Intensity
It is not an easy matter to create low-calorie,
no-calorie or reduced-calorie products using a sweetener ingredient.
Replacing sugar requires that the functional characteristics of sugar
— such as bulk, browning and taste — be met and balanced by the
correct combination of high intensity sweeteners, polyols or other
low-calorie sweeteners. Understanding how to achieve this balance is no
small feat.
High-intensity sweeteners are still an oft-used
solution to creating low-calorie foods, but taste obstacles often are
problematic when using these ingredients; the aftertaste or lingering
effects of these sweeteners can be undesirable. Some new technologies for
low-calorie foods are designed to help offset these negative sensory
effects.
“Most products that use high-intensity
sweeteners will use a blend of these ingredients to account for the taste
differences, but even so, the sweetness is slightly different in its flavor
profile than what you would get from a full-sugar product,” says
Markus Eckert, vice president of technical, flavors, Mastertaste,
Teterboro, N.J. “We have developed sweetener enhancers and sugar
extenders — natural flavors that function as part of a complete
flavor system to interact with the taste receptors on the tongue to
potentiate the ‘sweet’ flavor signals and to achieve the
desired flavor profile.”
These products do not replace the sugar or the
high-intensity sweeteners in a system, but are instead designed to help
compensate for sweetness intensity in sugar products and the taste profile
in diet products.
“When using high-intensity sweeteners, some of
those ingredients deliver a bitter aftertaste or an artificial chemical
off-note, and our natural flavor modulators compensate for those profiles
so the taste is closer to a full-sugar profile,” Eckert says.
“But these ingredients must be customized for each formulation,
because once you play with taste perception on the tongue, you alter other
aspects of the product’s taste and flavor profile.”
Frozen Tundra
Of course, much of the movement in the sweetener
alternative field is toward the use of the sugar alcohols, either alone or
sometimes paired with the high-intensity ingredients. Considerations when
using the sugar alcohols include the necessity to replace the bulk of
sugar, and accounting for differences in the polyol sweetness levels versus
sugar. Certain sugar alcohol ingredients are particularly well-suited for
the texture attributes of dairy products and applications.
“Litesse has been used in many no-sugar-added and
light ice creams for years, and can be used without sacrificing creaminess,
smoothness or taste,” says Donna Brooks, product manager at Danisco
Sweeteners, Elmsford, N.Y. “Litesse exhibits a favorable effect on
the freezing point of an ice cream mix, and modification of textural
qualities such as hardness and softness may be achieved by using
combinations of Litesse with other sugars or polyols such as
lactitol.”
The three sugar replacers that Danisco offers —
Litesse, lactitol and Xylitol — are often used in various
combinations with the high-intensity sweeteners, together accounting for
the bulk of sugar and delivering desired texture attributes. Lactitol has a
similar freezing point depression to sugar, so it is often used to replace
sucrose in ice cream to give products the same scooping characteristics, as
well as imparting a compatible sweetness and mouthfeel because it is
derived from milk lactose.
The frozen dessert segment within the no-sugar-added
(NSA) proposition has exploded within the past year. More ingredients have
come to the fore that help ice cream manufacturers account for sugar
replacement in formulations while also delivering the taste and texture of
full-fat ice creams.
“Many of the NSA ice creams that are currently on
the market contain a combination of sorbitol or lactitol, polydextrose,
maltodextrin and a high-intensity sweetener to replace the sucrose and corn
syrup. However, our Maltisweet IC Maltitol Syrup was created specifically
for NSA and reduced sugar ice cream applications, and can be used as the
sole sweetening agent,” says Clement Opawumi, senior food scientist
at SPI Polyols, New Castle, Del. “Maltitol syrup replaces the bulk
solids of sugar, has no aftertaste, is 90 percent as sweet as sugar and
delivers a sweetness profile that is preferred to the high-intensity
ingredients.”
Maltisweet IC Maltitol Syrup is a combination of
maltitol sugar alcohol, diglycerides and polysaccharides, which together
yield a molecular weight that is remarkably close to that of sugar. With
characteristics nearly identical to sugar and corn syrup, this ingredient
can function as a one-to-one replacement, delivering an almost identical
freezing point depression and thereby yielding desirable textural benefits.
“Products that replace sugar but alter the
freezing point depression can suffer from one of two problems: Either the
freezing point depression is shifted lower, which means the finished
product is softer and more water is frozen into the mix resulting in an icy
and cold texture,” Opawumi says. “Or on the other extreme you
have products with a high freezing point, which means the finished products
are gummy and runny. Balancing the freezing point is extremely important
when replacing sugar, and this syrup is optimal in this regard.”
Culturally Speaking
One of the trends in cultured dairy products within the
past year was the use of sweetener alternatives in yogurts; many of the
newest drinkable yogurts and cup yogurt products had the label banner
“light” and a corresponding reduction of sugar and lower
calorie counts.
While sugar alcohols can be used in these products,
other new ingredients are making inroads for use in this dairy segment,
offering alternative advantages. For example, some of these sweetener
alternative ingredients avoid the tolerance level considerations that are
sometimes an aspect of formulating with the polyols.
New dairy products on the market in Europe are
incorporating a new ingredient, Palatinose, a disaccharide derived from
sucrose that acts as a functional carbohydrate to replace traditional
sugars like sucrose. This sweetener alternative is metabolized differently
from sucrose by the body because its chemical molecular properties are
rearranged when it is manufactured so the body digests the ingredient much
more slowly. This results in an ingredient with a very low glycemic
response and low insulinemic response to deliver a prolonged energy supply
as glucose.
“Palatinose can be used in dairy applications
like milk-based beverages, yogurt-based beverages and yogurt. With its slow
release into the blood stream, this ingredient extends energy and satiety
when used in dairy applications,” says Debra Bryant, director of
business development and technical services, Palatinit of America, Morris
Plains, N.J. “This ingredient is a sugar and is broken down by the
same enzymes that the body employs to utilize sucrose, so there are no
tolerance issues. Since the hydrolysis of Palatinose takes significantly
longer than sucrose, it is supplying a constant stream of energy to the
muscles and brain over an extended period of time.”
One product recently launched in Spain from Danone is
Danao with Palatinose, which has the label banner “long-lasting
energy” on the front panel. In Asia, Palatinose is in Bifiene from
Yakult in Japan, where it is used for its functional properties as a
stabilizing and masking agent in combination with probiotics, soy and
omega-3 fatty acids. The possibilities for Palatinose abound because
its slow release into the blood stream promotes metabolic fat oxidation, so
the mobilization of stored fat and the use of fatty acids result, making
Palatinose an ideal ingredient for weight-control applications.
Here in the United States, erythritol is being used in
more dairy applications, particularly because the label claims it affords
can be advantageous for natural or organic products. Stonyfield Farm,
Londonderry, N.H., uses erythritol in the company’s line of light
smoothies and light yogurts, billing the ingredient as a no-calorie,
naturally fermented sugar.
“Erythritol is manufactured by a natural
fermentation process, unlike other sugar alcohols which undergo catalytic
chemical hydrogenation. There are also organic versions of erythritol
available,” says Ravi Nana, technical specialist for polyols for
Cargill’s Sweetness Solutions business, Cargill, Minneapolis.
“Erythritol has high digestive tolerance, a low glycemic and
insulineamic index and zero calories. For many dairy applications,
erythritol functions to replace the bulk of solids.”
Erythritol has a relative sweetness of 70 percent,
which means it is usually balanced by other high-intensity sweeteners in
formulation to achieve the desired sweetness level. In frozen desserts, the
replacement of sugar’s bulk is necessary to maintain total solids and
control the freezing point.
“Stonyfield Farm is getting very positive
feedback from consumers who are excited about having a product in the
natural channel that is lower in sugar and calories,” says Joe
Klemaszewski, senior food scientist for dairy applications at
Cargill’s Texturizing Solutions Business. “Better-for-you
products have shown strong growth recently. Both reduced-calorie and
reduced-sugar products are included in this category, and organic and
natural products demonstrate long-term growth as a trend into the
foreseeable future.”
It is this natural segment and designation which might
pose the biggest challenge, but also the most promising opportunity for the
future of reduced-sugar dairy products. With new attention on obesity,
there is a call to create products that stay away from the high-intensity
sweeteners.
“The health of children has become a paramount
concern, and although parents want a refined sugar reduction as much as
possible, there is a general perception in the market right now that
negatively reflects upon high-intensity sweeteners in products for
kids,” says Steve Phelps, technical manager of natural products at
Mastertaste. “This is where new natural sweetener alternatives have a
future opportunity as a preferred sugar replacement.”
Mastertaste has developed sweetening ingredients that
are based on honey, molasses and maple sugar. Although the ingredients do
not provide calorie reduction, they present the opportunity to remove
high-fructose corn syrup from labels.
The natural sweetener alternative route is one to
track, as the quest for healthier products continues to gain momentum. In
the meantime, sweetener alternatives and formulations that offer a calorie
reduction and sugar replacement are lucrative and viable segments of the
dairy industry.
“The reduced-sugar products like low sugar and
sugar reduced seem to have staying power,” Eckert says. “This
change is probably because there is more concern about artificial
sweeteners and their effects upon health in the long term. Our market data
shows a clear trend toward developing products that are absent of those
artificial sweeteners but still offer some reduction in the level of sugar,
offering consumers products that answer their overall concerns about health
and well being.”
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