Nav: Home

Sweet, tasty and healthy -- the new essence of juice?

March 29, 2016

Sweet, tasty and healthy - the new essence of juice?

Lime, fibre and stevia provide a cocktail of ingredients that can be added to fruit juice to increase its nutritional value and promote the sensory experience of the juice.

Do you have a sweet tooth but need to keep a wary eye on your weight and blood sugar level? Then a new cocktail consisting of lime, stevia and β-glucans may be the answer to your prayers. In a study at Aarhus University the effect on the sensory experience of adding these three ingredients to juice was investigated. This trinity of ingredients means it is possible to make a tasty fruit beverage that is both low in sugar and high in fibre.

Many people like drinking fruit juice, which is both a good and bad thing. Fruit juice contains a number of beneficial vitamins but often has high sugar and low fibre contents. The challenge is to increase the nutritional value of the juice without spoiling the taste. A team of scientists that included researchers from Aarhus University devised a solution to the problem of combining sweetness with healthiness by adding stevia for sweetness and β-glucans for fibre with a dash of lime to adjust the taste.

Super sweetness joins fibre for health

A high intake of sugar is one of the factors contributing to obesity and lifestyle diseases, but cutting out sugar can be difficult. To satisfy our desire for something sweet while limiting our consumption of sugar, a natural sweetener called stevia can be used.

- Stevia is the only approved natural sweetener in Europe. From a health and technological viewpoint, the effects of using stevia have been purely positive, explains postdoc Line Holler Mielby from the Department of Food Science at Aarhus University.

Unfortunately, a characteristic of stevia is its effect on taste. Juice containing stevia has a tendency to leave a bitter aftertaste.

Earlier research results have shown that fibre in food has a number of health-promoting effects. Fibre products that have a positive effect on health include β-glucans - which are naturally occurring in oats, for example. However, β-glucans also have an adverse effect on flavour in that they give the food product a slightly metallic and stale smell.

The sensory experience is important

Foods should not only be healthy in order for consumers to buy them. They should also give the consumer a good sensory experience.

- Foods should have satisfying sensory characteristics, since these characteristics will determine whether the consumer will buy the product again. The product should leave a good all-round impression, explains Line Holler Mielby.

Adding healthy fibre and low-calorie sweeteners to food will not work if they have a negative effect on the flavour. A remedy has to be found for this and in this instance the choice fell on lime. In the study the scientists used an apple-cherry juice to which varying quantities of lime, β-glucans and stevia were added. The aim was to characterise the sensory experience of the juice.

The results showed that the addition of lime to the apple-cherry juice could counterbalance the adverse impact on taste of the stevia and β-glucans. The taste of lime in the juice concealed not only the aftertaste of stevia but also the smell of staleness and metals imparted by the β-glucans and improved the experience of drinking fruit juice containing β-glucans.

- With the increasing popularity of functional food, it would be relevant to examine the effects in other food products such as breakfast cereals that have a high sugar and low fibre content. In relation to the addition of β-glucans to food it would also be relevant to examine other eating experiences, for example satiety, says Line Holler Mielby.
-end-
Read the article "Changes in sensory characteristics and their relation with consumers' liking, wanting and sensory satisfaction: Using dietary fibre and lime flavour in Stevia rebaudiana sweetened fruit beverages" in the scientific journal Food Research International.

For further information please contact: Postdoc Line Holler Mielby, Department of Food Science, e-mail: lineh.mielby@food.au.dk, telephone: +45 8715 4868

Aarhus University

Related Taste Articles:

Knowledge of the origin of the food makes it taste better
Food we are familiar with tastes the best, but if we know where the food comes from and how it is made, it actually gets better, even if we don't think the taste is spot on.
Obesity tied to weakened response to taste
Obesity is connected with a reduced response to taste, according to a new study featuring faculty at Binghamton University, State of University of New York.
Virtual reality takes a leap into taste
optoPAD is a newly developed system for creating virtual taste realities.
Source of citrus' sour taste is identified
A team of researchers, including two from the University of California, Riverside, has identified the genes responsible for the hallmark sour taste of many citrus fruits.
So close, rats can almost taste it
A subset of neurons in the hippocampus respond to both place and taste, according to research in male rats published in JNeurosci.
A taste for fat may have made us human, says study
A new paper argues that early human ancestors acquired a taste for fat long before they began hunting for meat by scavenging marrow from the skeletal remains of large animals.
Making cheese & co. taste better
Researchers at the Technical University of Munich (TUM), the Leibniz-Institute for Food Systems Biology, and the University of Hohenheim have developed a new methodical approach.
Saliva could influence taste preferences
Saliva is crucial for tasting and digesting food. But scientists have now found that saliva could also be part of a feedback loop that influences how food tastes to people -- and by extension, what foods they're willing to eat.
The origin of off-taste in onions
Chopping onions is usually associated with watery and stinging eyes.
What does the koala genome tell us about the taste of eucalyptus?
Sequencing of the koala genome has revealed some interesting qualities about these marsupials on their sense of taste.
More Taste News and Taste Current Events

Top Science Podcasts

We have hand picked the top science podcasts of 2019.
Now Playing: TED Radio Hour

Accessing Better Health
Essential health care is a right, not a privilege ... or is it? This hour, TED speakers explore how we can give everyone access to a healthier way of life, despite who you are or where you live. Guests include physician Raj Panjabi, former NYC health commissioner Mary Bassett, researcher Michael Hendryx, and neuroscientist Rachel Wurzman.
Now Playing: Science for the People

#544 Prosperity Without Growth
The societies we live in are organised around growth, objects, and driving forward a constantly expanding economy as benchmarks of success and prosperity. But this growing consumption at all costs is at odds with our understanding of what our planet can support. How do we lower the environmental impact of economic activity? How do we redefine success and prosperity separate from GDP, which politicians and governments have focused on for decades? We speak with ecological economist Tim Jackson, Professor of Sustainable Development at the University of Surrey, Director of the Centre for the Understanding of Sustainable Propserity, and author of...
Now Playing: Radiolab

An Announcement from Radiolab