Glycyrrhizic Acid for Heat-Stable and pH-Tolerant Sweetness Systems

Glycyrrhizic acid, the main sweet component of licorice, is widely recognized for its long-lasting sweetness character and its use in food and beverage applications. Industry and scientific sources describe it as a natural sweetener with notable stability in common processing conditions, which makes it suitable for product concepts that require heat treatment or extended storage.

This matters because many sweetening systems are judged not only by how they taste at the moment of consumption, but also by how they behave during manufacturing. A sweetener that holds its structure better during heating, filling, or mixing is easier to build into commercial products. Glycyrrhizic acid supports that need with a more robust physical profile than many delicate natural alternatives.

Research on glycyrrhizin and glycyrrhizic-acid-related materials shows strong tolerance to common thermal processing conditions. In a study specifically examining thermal treatment and pH effects, glycyrrhizin remained highly stable under 100°C and 121°C treatments across multiple pH levels, which is directly relevant to baking and hot-fill food systems. Another stability study on monoammonium glycyrrhizinate reported useful thermal behavior and concluded that the material is stable in a pH range from 7 to 9, supporting its suitability for food-industry use.

For manufacturers, this means glycyrrhizic acid can be considered for:

• Baked products that undergo sustained heat exposure.
• Hot-filled drinks and processed beverages.
• Products that require sweetness retention after thermal handling.

Rather than relying on fragile sweetening systems that degrade quickly under heat, brands can use glycyrrhizic acid as a more processing-tolerant ingredient in systems where functional sweetness must survive the production line.

Glycyrrhizic acid also shows useful behavior across a broad pH range. Research indicates that its physicochemical behavior is pH-dependent, but stable performance is observed in neutral to mildly acidic conditions. A paper on glycyrrhizic acid aggregation reported meaningful behavior at pH 4.5 and above, while also showing that the compound’s assembly state changes with pH. More recent work on glycyrrhizic acid self-assembly further confirms that pH influences its structural state, with different aggregate forms observed across pH 2–8.

For formulation purposes, the practical message is clear:

• Glycyrrhizic acid is well suited to neutral systems.
• It can also be used in many mildly acidic products, depending on the complete formula.
• Extremely acidic environments require more careful evaluation, because the compound’s physical state can change as pH shifts.

This makes it a strong candidate for plant-based teas, fruit-flavored drinks, oral nutrition products, and other systems that sit in the mild-acid to neutral range.

One reason glycyrrhizic acid is attractive in commercial applications is that it provides sweetness without depending on high sugar loads. Food and industry references describe it as a natural ingredient that can intensify sweetness, extend flavor perception, and improve overall taste balance. That makes it useful not only as a sweetening ingredient, but also as a taste-structure tool in products that need a smoother sensory profile.

In premium sugar-reduction formats, this means glycyrrhizic acid can help brands:

• Build sweetness continuity in complex botanical systems.
• Support stable sweetness in heat-treated products.
• Offer a plant-derived sweetness option with a strong clean-label story.

It is best described as a formulation-friendly ingredient rather than a one-size-fits-all sweetener. Its value lies in helping manufacturers create more stable, more complete sweetness systems in products that face real processing demands.