Digestion

From Barley to Enzyme Rich Malt Extract: Why Malting Matters

Barley grain contains a biological system designed to become active when the seed begins to germinate. Malting deliberately activates that system, increasing the activity of enzymes capable of breaking down starch, proteins and structural carbohydrates. Enzyme Rich Malt Extract uses this naturally generated enzyme system as its starting point, with subsequent processing designed to preserve useful enzyme activity.

Science explainer CaniNectar / Enzyme Rich Malt Extract research Open access

From Barley to Enzyme Rich Malt Extract: Why Malting Matters

Content type

Science explainer

Focus

Barley germination, malting, enzyme development and preservation of enzyme activity

The big question

Why use malted barley rather than simply adding a mixture of manufactured enzymes?

The answer begins with the biology of the barley seed.

A grain of barley contains stored nutrients intended to support the growth of a new plant.

When germination begins, the seed needs to make those nutrients available.

To do that, it activates a coordinated system of enzymes capable of breaking down starch, proteins and structural material within the grain.

Malting takes advantage of this natural process.

The big question is:

How does germinating barley create an enzyme-rich biological system, and how can that activity be retained in a usable extract?

How do scientists study it?

The production of malt begins with controlled germination of cereal grain, most commonly barley.

The process can be understood in several stages.

1. The grain is hydrated

Barley seeds are exposed to water.

This raises the moisture content of the grain and triggers the biological processes associated with germination.

The seed is no longer metabolically dormant.

2. Germination begins

As the embryo begins to grow, the grain needs access to the energy and nutrients stored within it.

This activates and generates enzymes that can dismantle the seed's stored material.

Enzyme activities associated with malting include amylases, proteases and enzymes capable of degrading components of plant cell walls.

3. The grain becomes malt

Controlled germination is allowed to proceed until the desired biological changes have occurred.

At this point the grain has a very different biochemical profile from the dormant barley seed with which the process began.

Its stored nutrients have begun to be mobilised and its enzyme system is active.

4. Germination is stopped

In conventional malting, germination is stopped by drying the malt.

This stage is commonly known as kilning.

Temperature and drying conditions matter because enzymes are proteins and excessive heat can reduce their activity.

Different types of malt are therefore produced using different processing conditions depending on whether flavour, colour or enzyme activity is the priority.

5. The enzyme-rich material is extracted

For Enzyme Rich Malt Extract, malted barley provides the biological starting material.

Tharos has developed a patented processing approach designed to retain naturally occurring enzyme activity while converting the malt into a practical ingredient.

The important objective is not simply to produce malt extract.

It is to produce an extract that retains a broad spectrum of biologically active enzymes.

What can we measure?

Several biological changes occur as barley becomes malt.

Amylase activity

Amylases help the germinating seed mobilise stored starch.

Alpha-amylase and beta-amylase act on starch in different ways, producing smaller carbohydrate molecules.

Malting substantially increases the grain's capacity to break down its starch reserves.

Protease activity

Proteases break proteins into smaller peptides and amino-acid-containing fragments.

These nutrients are needed by the developing seed and also contribute to the biochemical changes occurring during malting.

Beta-glucanase activity

Beta-glucans form part of the barley cell-wall structure.

Beta-glucanases help dismantle these structures during germination.

Other carbohydrate-active enzymes

The malt enzyme system contains activity against several complex carbohydrate structures rather than acting only on starch.

Depending on the malt and analytical method, activities associated with compounds including xylans and other plant-cell-wall carbohydrates can be detected.

Phytase activity

Germination can also activate phytase and change the amount and chemical availability of phytate-associated phosphorus.

Together, these processes make malted grain biologically very different from ungerminated barley.

What have we learned?

The most important feature of malting is that the enzyme system is created by the biology of the grain itself.

The process does not begin with an externally assembled enzyme premix.

Instead, germination activates the machinery that barley naturally uses to mobilise its own nutrients.

This produces a broad spectrum of enzyme activities within one biological matrix.

The challenge then changes.

Once that enzyme activity has been created, processing needs to preserve as much useful activity as possible.

Heat, moisture, pH and processing time can all affect enzyme stability.

This is why the manufacture of an enzyme-rich malt extract is different from simply making an ordinary malt syrup.

The objective is not only extraction and concentration.

It is extraction and concentration while retaining enzyme activity.

Why does this matter?

Understanding malting helps explain what is distinctive about Enzyme Rich Malt Extract.

The starting material is not simply barley.

It is germinated barley in which a naturally coordinated enzyme system has been activated.

That enzyme system includes activity associated with the breakdown of several different dietary substrates.

Tharos' patented technology is designed around preserving this enzyme-rich character in an extract that can be incorporated into nutritional products.

This creates an important distinction:

Barley → germination → active malt enzyme system → extraction → Enzyme Rich Malt Extract

The biology comes first.

The processing technology is designed to retain and deliver what the germinating grain has already created.

This is also why Enzyme Rich Malt Extract should not be thought of simply as another source of sugar or as an isolated enzyme blend.

The wider malt matrix and its naturally generated spectrum of enzyme activities are part of the material being produced.

For the ingredient list and daily feeding guide of the finished product, see the CaniNectar product page.

What should we keep in mind?

Several distinctions are important when discussing the production process.

Not all malt is the same

Barley variety, germination conditions and processing can all influence enzyme activity.

An ordinary food-grade malt extract should not therefore be assumed to have the same enzyme profile as an extract specifically produced to retain high enzyme activity.

Processing conditions matter

Enzymes are proteins whose activity can be affected by temperature, moisture, pH and processing time.

The presence of an enzyme in the original malt does not guarantee that the same activity will survive every manufacturing process.

The patented process should not be oversimplified

Public patent documents describe the principles and embodiments of Enzyme Rich Malt Extract production, but they should not be interpreted as revealing every detail of current commercial manufacturing.

Specific production parameters and quality-control procedures may remain proprietary.

Enzyme activity does not by itself demonstrate a biological outcome

Showing that an extract contains active enzymes establishes biochemical capability.

Whether that activity produces a measurable effect in a dog must be investigated separately through appropriate research.

Sources and further reading

References

Tharos Ltd. Enzyme-rich malt extract formulations. Patent family including US12005098B2, originally filed 23 November 2017 with priority from 23 November 2016.

The patent describes malt extracts containing multiple enzymatically active carbohydrases and embodiments using high-diastatic malted barley, extraction, filtration and concentration processes designed to retain enzyme activity.

Briggs DE. Malts and Malting. Blackie Academic & Professional.

Bamforth CW. Barley and malt starch in brewing: a general review of the scientific principles underlying malting and the development of enzyme activity.

General malting literature shows that germination increases activities including alpha-amylase, protease and beta-glucanase and that subsequent drying conditions influence the retention of enzyme activity.

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