As functional beverage formulations become more complex, flavor challenges are becoming harder to solve with a single approach.
Proteins, alternative sweeteners, and functional ingredients each introduce distinct off-notes—bitterness, astringency, or lingering aftertastes. When combined, these effects don’t just add up—they interact, often creating a more complicated sensory profile than expected.
Masking is often the first place teams turn. And in many cases, it’s necessary.
But on its own, it’s rarely sufficient.
Where Masking Falls Short
A common approach is to screen a range of masking solutions and evaluate performance. In simpler systems, this can be effective. In more complex formulations, results are often inconsistent.
Teams may see:
- Minimal improvement across multiple maskers
- Partial improvement—one note is reduced, but others remain
- New off-notes introduced through the masking system itself
In some cases, layering additional maskers or increasing flavor intensity can create more imbalance rather than resolving the issue.
These outcomes aren’t necessarily a failure of the masker—they’re a reflection of how the system is behaving.
Understanding the System Matters
Off-notes in functional beverages are not uniform, and they don’t behave the same way across applications.
- Protein systems may contribute both bitterness and drying mouthfeel
- Protein systems may introduce specific off-notes, such as cheesiness (whey) or earthiness (plant)
- High-intensity sweeteners can introduce linger or temporal imbalance
- Functional actives may bring metallic, earthy, or sulfurous notes
These attributes also change throughout the tasting experience—what’s perceived upfront may not be the same as what lingers after.
Without a clear way to describe and evaluate these characteristics, it becomes difficult to diagnose what’s actually happening—and why a solution may only be partially effective.
Beyond Masking: A More Complete Approach
Addressing complex flavor challenges often requires more than reducing a single off-note. It requires adjusting how the product is perceived as a whole.
This is where modulation becomes important.
Depending on the system, that may involve:
- Adjusting sweetness onset to reduce perceived bitterness
- Increasing sweetness intensity without adding more sweetener
- Reducing astringency or drying effects
- Shifting overall flavor character to better align with the target profile
In practice, this often means combining approaches—using masking where appropriate, while also making targeted adjustments to balance the full sensory experience.
The Role of Sensory Structure
As formulations become more complex, so does the need for a consistent way to evaluate them.
Describing a product as “bitter” or “off” is rarely enough to guide formulation decisions. More precise identification of attributes—what they are, when they appear, and how they evolve—can significantly improve how teams approach problem-solving.
Structured sensory tools, such as lexicons or guided evaluation frameworks, can help teams:
- Better characterize off-notes
- Align across R&D and cross-functional teams
- Move more efficiently from observation to solution
Applying Solutions in Real Systems
Effective flavor strategies need to hold up beyond initial screening.
Considerations like format, processing, shelf life, and label constraints all influence how a solution performs in the final product. What works in one system may not translate directly to another.
That’s why masking and modulation strategies are most effective when they’re developed with the full application in mind.
A Practical Approach to Complex Flavor Challenges
As expectations for functional beverages continue to rise, solving for flavor requires a more structured and application-focused approach.
At Imbibe, we combine masking and modulation strategies with formulation and sensory expertise to help teams address complex taste challenges—whether related to protein, sweeteners, or functional ingredient systems.
If your team is working through complex taste challenges, we offer hands-on sessions that bring these concepts into practice.
Reach out to marketing@imbibeinc.com to learn more about our approach to masking and modulation.
