Companies that help with taste masking bitterness in functional beverages fall into three groups: global flavor houses with receptor-informed masking platforms (Givaudan, IFF, dsm-firmenich, Kerry, Symrise, Sensient, MANE, T. Hasegawa), specialist bitter-blocker ingredient suppliers (MycoTechnology, Blue California, FlavorHealth, Sweegen, Synergy Flavours, Edlong, Virginia Dare, Comax), and ingredient delivery companies that change the physical form of the active so fewer off-notes reach the palate in the first place. Suppliers such as Givaudan, IFF and Sensient describe integrated approaches that combine receptor blockers, sweetness modulation and mouthfeel enhancers, and brands often pair a flavor-side masker with a delivery-form active. This guide profiles each category, explains the mechanisms behind the claims, identifies which functional actives resist masking most, and sets out how to evaluate a supplier.

Why Functional Beverages Taste Bitter

Bitterness is a receptor event. Humans detect thousands of bitter compounds through only about 25 TAS2R bitter taste receptors, and individual receptors differ widely in how many compounds they recognize. In the reference screening study by Meyerhof and colleagues, three receptors together detected roughly half of 104 test compounds, while 19 compounds activated up to 15 receptors at once. This has two practical consequences for formulators. First, a blocker that silences one receptor rarely silences a broadly tuned bitterant such as caffeine or a protein hydrolysate. Second, consumer sensitivity varies by genotype, so sensory panels must represent the target population rather than a single lab.

In functional beverages the bitter and astringent load comes from the actives themselves: caffeine, green tea catechins, steviol glycosides, pea and whey hydrolysates, potassium and magnesium salts, iron, and botanicals such as ashwagandha and turmeric. We discuss these formulation challenges in more detail in our article on what makes a functional drink actually functional. The key point is that each active activates a different receptor set, so the masking strategy has to match the specific bitterant.

Group 1: Flavor houses with named masking platforms

The large flavor companies supply masking as a service: they screen the bitterant against receptor assays, build a masking flavor or modulator blend, and validate it in the customer's beverage base. Each has a branded platform.

• Givaudan (TasteSolutions, PRIMETIME masking flavors). Givaudan has published work on receptor-level bitter blockers, including the compounds GIV3616 and GIV3727, which the company reports show faster dissolution and greater potency than earlier agents, as covered by Food Ingredients First. Its product listings cite typical masking-flavor use rates of about 0.1 to 0.2% in beverage applications targeting caffeine and stevia.

• IFF (FLAVORFIT Masking). IFF describes FLAVORFIT Masking as a molecular-level modulation platform for bitterness, astringency, metallic linger and plant-protein off-notes, with stated applications in fortified beverages, energy drinks and high-protein dairy and plant-based drinks.

• dsm-firmenich (ModulaSENSE). The company's receptor-based ModulaSENSE maskers target bitterness, astringency and licorice notes in ready-to-mix beverages and are integrated with its Vertis plant-protein line, according to its press release. The receptor-screening technology originates partly from Senomyx, whose Bittermyx BB68 blocker reported 40 to 60% bitterness reductions against soy and whey protein, caffeine, cocoa and rebaudioside A in its 2017 annual report before Firmenich acquired the business.

• Kerry (Tastesense Masking). Kerry tailors masking by protein source (whey, pea, soy) and publishes a case study reformulating a zero-sugar energy drink to remove acesulfame-K while masking off-notes on its Tastesense Masking page.

• Symrise (Symlife Mask). Symrise's portfolio addresses stevia bitterness and astringency plus plant-based dairy off-notes, combining masking raw materials, encapsulation and mouthfeel modulators, as described by New Hope Network. Symrise is also our distribution partner: its Taste, Nutrition & Health division launched an Active Living portfolio of Infusd-enabled water-soluble ingredients under a strategic partnership.

• Sensient (TrueBoost, Smoothenol). Sensient positions these ranges for bitterness, astringency, metallic notes and chalkiness from plant proteins and fortification, with mouthfeel modulation as part of the approach, per its overview brochure.

• MANE (SENSE CAPTURE Mask). MANE offers masking lines for plant-protein bitterness and astringency plus a dedicated stevia line for licorice and lingering notes on its health and wellness page.

• T. Hasegawa (flavor modulation, Boostract). T. Hasegawa supplies customized modifiers that block bitterness in herbal, adaptogen and vitamin-fortified drinks, as outlined on its flavor modulation page.

Flavor houses supply masking as part of a broader flavor-development service, which suits programs where the beverage flavor system is being built at the same time.

Group 2: Specialist bitter-blocker ingredient suppliers

These companies sell a defined masking ingredient rather than a full flavor service.

• MycoTechnology (ClearTaste). A fermentation-derived, FEMA GRAS bitter blocker marketed for high-intensity sweeteners, plant proteins, coffee, cocoa and potassium chloride aftertaste. FoodNavigator reported its expansion into salt reduction.

• Blue California with Conagen (Sensegen). A nature-based bitter blocker the company claims works across coffee, tea, tonic, energy drinks, plant proteins, cannabinoids and vitamin supplements, with production scale-up announced via Yahoo Finance.

• FlavorHealth (formerly Chromocell's flavor business). Uses receptor-based screening of fruit, herb and vegetable fractions to identify natural modulators and reports 40 to 60% bitterness reductions, according to Beverage Industry.

• Sweegen. Supplies bitter blockers applicable to caffeine and other bitterants and is commercializing the sweet protein brazzein, which combines sweetness with bitter-blocking performance, per its beverage expertise page.

• Synergy Flavours. Developed targeted maskers for BCAA beverages with a reported 20% bitterness reduction in prototypes, as covered by Nutraceutical Business Review.

• Edlong (ProMasker). Uses dairy-type and plant-congruent flavors to mask bitter, metallic and stale notes in high-protein and fortified products, including at dairy protein inclusion of 20% or more, per Edlong.

• Virginia Dare and Comax. Virginia Dare offers masking systems for bottled teas, smoothies and fortified drinks; Comax's stevia-masking work for rebaudioside A blends was documented by FoodNavigator-USA.

The percentage reductions above are supplier-reported. Independent, peer-reviewed sensory validation for most commercial blockers is limited, so brands should request panel data generated in a matrix close to their own.

Group 3: Delivery and solubility technology companies

The third group does not block receptors. It changes the physical state of the active so that less bitterant, and fewer secondary off-notes, reach the tongue. Three mechanisms are common:

• Encapsulation and cyclodextrin complexation coat the bitter molecule or delay its release so the beverage's flavor system clears before the bitterant is perceived. The trade-off is release profile, mouthfeel and cost.

• Emulsification and lipid-based delivery bind lipophilic actives and their off-notes within oil droplets. Documented beverage examples for fish oil and curcumin are limited, and physical stability in a clear, carbonated or heat-treated beverage is the main constraint.

• Water-solubilization converts the active into a form that disperses fully in the aqueous phase without surfactant-type emulsifiers. Infusd operates in this category. Our proprietary physical processing method uses natural stabilizers, no synthetic emulsifiers and no harsh chemicals, to produce water-soluble liquid and powder forms with active payloads of 10% or more and real-time stability of 24 months or longer, including after pasteurization, UHT and carbonation.

Our approach fits in two specific ways. First, our technology is designed not to alter desired taste or mouthfeel; the ingredient contributes a neutral, mild profile rather than an added flavor. The clearest example is our omega-3 range, which we describe as having no marine notes on our applications page. Second, a receptor-level bitterant such as caffeine or a bitter peptide still activates TAS2Rs once dissolved. For those actives, a water-soluble form addresses dispersion and stability, but a flavor-side masker remains part of the toolkit. We work alongside flavor houses rather than in place of them, and the Symrise partnership reflects that division of labor.

Which Functional Actives Are Hardest to Mask

Supplier literature and trade coverage such as Beverage Industry most frequently cite the following classes as difficult targets in beverage matrices. The order reflects how often they appear, not a published ranking.

1. Plant and dairy protein hydrolysates. Bitter peptides plus astringency and chalkiness. Suppliers match maskers to the protein source because pea, soy and whey generate different peptide profiles.

2. Minerals (potassium, magnesium, iron). Metallic and lingering notes that sweetness alone does not cover. Salt form affects solubility; our magnesium malate guide explains why solubility should be measured for the specific ingredient grade and use pH rather than assumed.

3. Caffeine and green tea polyphenols. Broadly tuned bitterants and tannin astringency. Masking flavors and receptor blockers both target them, but the supplier material reviewed does not quantify reductions for green tea polyphenols in finished beverages.

4. Steviol glycosides. Licorice and lingering sweetness; Symrise, MANE, Comax, Givaudan and IFF each offer stevia-specific masking or modulation lines.

5. Botanicals and adaptogens. Ashwagandha, reishi and turmeric combine bitterness with earthy notes and poor solubility. Our wellness shots article covers the formulation issues these ingredients create in small-volume formats.

6. Omega-3 fish oil, cannabinoids, curcumin and collagen. Blue California claims Sensegen efficacy against cannabinoid bitterness, but public beverage sensory data for cannabinoids, fish oil, curcumin and collagen are not documented in the available supplier evidence, and brands should expect to generate their own.

Regulatory and Labeling Considerations

Regulatory status is ingredient-specific and market-specific, and a supplier's dossier should be reviewed before a masking agent enters a formula.

• United States. Status is ingredient-specific. MycoTechnology reports ClearTaste as FEMA GRAS, and Senomyx-origin ingredients received GRAS designations and JECFA determinations according to company filings. The FEMA GRAS program is an independent expert-panel assessment that evaluates substances only for flavoring use in human food; FEMA GRAS status is not an FDA approval, and the panel does not evaluate ingredients with non-flavoring functions. Whether a masker can be declared as "natural flavor" depends on the definition in 21 CFR 101.22(a)(3): the substance must derive from a listed natural source and its significant function must be flavoring rather than nutritional. Sweet proteins follow a different route; Sweegen submitted a GRAS notice for brazzein to FDA.

• European Union. Flavouring substances fall under Regulation (EC) No 1334/2008 and its Union list, which also sets the specific requirements for using the term "natural"; newer fermentation-derived or enzymatically produced modulators may instead require Novel Food assessment, and EU status for many newer modulators is not publicly documented. dsm-firmenich, for example, staged its ModulaSENSE launches separately for North America and Europe.

• Clean-label positioning. A water-soluble active that needs no synthetic emulsifier removes that emulsifier from the ingredient statement, but it does not change the regulatory status of any separately added masker. Our clean-label solubility work for natural colors, flavor systems and preservatives follows the same principle: remove the additive rather than relabel it.

How to Evaluate a Taste Masking Partner

1. Receptor matching. Ask which TAS2Rs the bitterant activates and whether the supplier screened its blocker against them. Broadly tuned bitterants need broadly acting or multi-component solutions.

2. Matrix-specific sensory data. Request trained-panel results in a base close to yours, at your target active dose, pH and sweetener system. Supplier-reported averages from other matrices transfer poorly.

3. Process survival. Confirm stability through pasteurization, UHT, hot-fill or carbonation for both the masker and the active. Delivery-form suppliers should provide real-time stability data, not only accelerated studies.

4. Interaction with the active's form. Establish whether the active disperses fully in the finished beverage before masking work begins, because the masker must be validated against the form that reaches the consumer. Our solubility explainer covers how solubility relates to format and delivery.

5. Label outcome. Determine how each component declares in the US and EU before the sensory work begins, not after.

6. Consumer segment validation. Genetic variation in bitter sensitivity means a formula that passes an internal panel can fail with a high-sensitivity consumer segment. Validate with the intended audience.

Brands that want to test a water-soluble active alongside a flavor house's masking system can contact our formulation team for application guidance.

Frequently Asked Questions

Which companies are best known for taste masking in functional beverages?

Givaudan, IFF, dsm-firmenich, Kerry, Symrise, Sensient, MANE and T. Hasegawa each operate a named masking platform. Specialist ingredient suppliers include MycoTechnology (ClearTaste), Blue California (Sensegen), FlavorHealth, Sweegen, Synergy Flavours, Edlong, Virginia Dare and Comax. Delivery-technology companies, including Infusd, address off-notes by changing the active's physical form rather than blocking receptors.

What is the difference between a bitter blocker and a masking flavor?

A bitter blocker is a compound that interferes with TAS2R receptor activation, so the bitter signal is reduced at the source. A masking flavor works perceptually by adding congruent aromas, sweetness or mouthfeel that compete with the bitter signal. Suppliers including Givaudan, IFF and Sensient describe integrated systems that combine both, together with mouthfeel modulators to blunt astringency and chalkiness.

Can water-soluble ingredient technology replace taste masking?

No. Water-solubilization changes the physical form of the active so it disperses and remains stable in the beverage, and our technology is designed not to alter desired taste or mouthfeel. It does not block the bitter receptors a dissolved bitterant activates. For caffeine, bitter peptides or steviol glycosides, a flavor-side masker is still needed.

Are bitter blockers labeled as natural flavors?

Only when they meet the definition in 21 CFR 101.22(a)(3): derived from a listed natural source with flavoring as the significant function. Status is ingredient-specific. MycoTechnology reports ClearTaste as FEMA GRAS, and other suppliers document GRAS or JECFA activity for individual actives, while EU flavouring and Novel Food rules apply separately. Confirm with the supplier's regulatory documentation for each market.

Which functional ingredients are the hardest to mask?

Protein hydrolysates, mineral salts (potassium, magnesium, iron), caffeine, green tea catechins, steviol glycosides and bitter botanicals such as ashwagandha and turmeric are the most frequently cited. Public beverage sensory data for omega-3 fish oil, cannabinoids, curcumin and collagen are limited, so brands typically need to generate their own.

How much bitterness reduction can a formulator expect?

Supplier-reported figures range from roughly 20% for targeted BCAA maskers to 40 to 60% for receptor-based blockers against proteins, caffeine and rebaudioside A. These numbers come from company data rather than independent peer-reviewed studies, and results depend heavily on the matrix, dose and consumer panel.

This article is for educational purposes and does not constitute medical advice. Consumers should consult a qualified healthcare provider before starting any new supplement or functional product.