IFF: Higher protein is creating a flavor problem – and vanilla could help solve it

IFF has highlighted vanilla’s growing technical role in high-protein and health-focused products, as greater protein and fiber content, reduced sugar and more nutrient-dense formulations create new sensory challenges for product developers.

• IFF reported that higher protein and fiber loads could introduce bitterness, metallic notes, dryness and other unwanted sensory characteristics into fortified foods and beverages.
• Vanilla could help mask off-notes, soften bitterness and support perceived sweetness, including when used below levels at which consumers would recognize a vanilla flavor.
• The company identified GLP-1 nutrition as an emerging application, where smaller portions could require greater nutrient density alongside lower sweetness and flavor intensity.

Protein may be one of the biggest drivers of current food and beverage development, but increasing the amount in a formulation can alter considerably more than its nutritional profile.

Proteins, fibers and other nutritional ingredients can introduce bitterness, metallic notes, cereal-like flavors, dryness and lingering aftertastes. Higher protein concentrations can also increase interactions between the protein and flavor compounds, changing how the finished product tastes.

“The more protein you have, the more interaction you are going to have and the greater the effect on the flavor profile,” said Sylvaine Declerck, Creation Director and Senior Flavorist for Dairy at IFF. “You have to look at the entire base, select the right modulation tools and then build the tonalities around it.”

IFF argues that vanilla can play several roles in addressing those problems, including some that have little to do with creating an identifiable vanilla flavor.

Certain vanilla profiles and vanillin can round off bitterness, soften harsh notes, reinforce creamy characteristics and increase perceived sweetness without increasing actual sugar content. That makes the approach particularly relevant to reduced-sugar protein products and formulations using high-intensity sweeteners.

“The materials used in high-protein and high-fiber products often have a strong taste of their own, and it is usually not the taste the product developer or consumer wants,” said Lorna Hide, Senior Flavorist at IFF. “Vanilla is often used for masking, even in products that are not meant to taste like vanilla.”

Vanilla can also help manage some of the sensory characteristics associated with sweeteners such as stevia, including bitterness, lingering aftertaste and licorice-like notes.

But IFF cautioned against treating flavor addition as a straightforward question of dosage.

The behavior of vanilla can change according to protein source, acidity, fat content, fiber, sweetness and processing conditions. UHT processing, extrusion and baking can also affect its stability and final sensory profile.

Those differences become particularly important when moving between dairy and plant-based formulations.

Protein-flavor binding and differences in the underlying matrix can suppress or amplify individual flavor characteristics. A vanilla profile that works effectively with dairy protein may therefore perform very differently with oat, soy or pea.

“In plant-based products, the answer is not simply to push the flavor higher and oversaturate the product,” said Merel Maas, Dairy Designer at IFF. “We look at which parts of the flavor are not coming through and how we can rebuild the balance for that specific base.”

IFF also identified another emerging formulation challenge: foods designed for consumers using GLP-1 medications.

Smaller portions can mean packing greater quantities of protein, vitamins, minerals and other nutrients into a reduced volume. At the same time, IFF said some GLP-1 users report changes in taste preferences or greater sensitivity to sweetness, bitterness and flavor intensity.

That combination could require a different approach from traditional sports nutrition products built around larger serving sizes and stronger flavors.

“Many GLP-1 consumers prefer smaller portions throughout the day because a large serving can feel overwhelming,” Maas said. “The product may need to carry a great deal of nutrition in a smaller volume, while also using lower sweetness and lower flavor intensity.”

IFF sees vanilla as one tool for reconciling those competing requirements. Its familiar profile can help soften bitterness and provide creamy characteristics without requiring high sweetness or flavor intensity.

Despite the proliferation of more adventurous flavors across protein bars, shakes and nutritional products, IFF said its own examination of popular high-protein products also found familiar flavors remained among consumers’ strongest choices, with vanilla continuing to lead.

That combination of consumer familiarity and technical functionality could make vanilla particularly useful as manufacturers pursue higher protein levels, sugar reduction and more concentrated nutrition.

The challenge, according to IFF, is to stop treating masking as a final-stage fix. Taste modulation, sweetness, mouthfeel, protein source, processing conditions and the main flavor profile need to be considered as a complete system.

“The customer is the expert on the base, and we are the experts on flavor,” said Helen Kane, Principal Flavorist at IFF. “The best results come from looking at everything holistically and working through the challenges together.”

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