How to Improve Flavor in High Protein Foods and Drinks

North American launches of high protein foods and drinks continue to expand, with Innova reporting a 23% increase in the latest 52 weeks ending June 2026. As brands respond to growing interest in protein, formulators must balance higher protein targets with taste and sensory expectations.

Start with the Protein Source and Sensory Challenge

Improving flavor starts with understanding the protein source and the sensory challenges it creates. Whey, pea, soy, and milk proteins can introduce different off-notes, textures, and processing considerations. Formulators can then match flavors and taste modulation tools to the specific challenges rather than relying solely on flavor.

Protein Source Matters

Although the Nutrition Facts label reports protein simply in grams, the source can create very different formulation considerations.

WHEY PROTEIN: CLEAN FLAVOR, HEAT SENSITIVE

Developers turn to whey protein for its clean taste but recognize it carries challenges with some formats and processing methods. Roughly one-third of high protein foods and beverages launched in North America over the last two years included whey.

Flavor profile: Neutral to slightly sweet, making it easy to flavor.

Texture: Dissolves in liquids, creating a smooth, light mouthfeel.

Heat sensitivity: High heat (like pasteurization) can cook the protein, causing it to clump or turn into a thick gel.

Acid dryness: In acidic drinks like clear protein waters, it can leave a dry, puckering sensation in the mouth.

PEA PROTEIN: EARTHY NOTES, TEXTURE HURDLES

Pea protein is a leading plant-based option, included in about two-in-ten launches, but its physical traits present unique hurdles compared to whey.

Flavor profile: Carries distinct earthy, grassy, and bitter notes that may require masking.

Texture: Does not dissolve as easily as whey, which can leave a chalky or gritty feel, especially in drinks.

Thickening power: Soaks up large amounts of water, which can accidentally dry out products like nutrition bars or make liquids too thick.

Visual appearance: May impart a natural yellowish-brown color to the food or drink base, affecting the appearance.

MILK AND CASEIN PROTEIN: CREAMY TEXTURE, SOME STABILITY RISK

Unlike whey, which stays thin and clear, milk protein concentrates (MPC) and pure caseins are useful texturizers that can introduce manufacturing considerations. Milk or casein proteins were part of approximately 15 percent of North American high protein food and drink launches over the past two years.

Flavor profile: Delivers a rich, clean, and desirable dairy flavor, but can develop a stale, “glue-like”, or cardboard taste if stored incorrectly.

Texture and creaminess: Provides a thick, creamy, and opaque mouthfeel, helping to mimic the richness of fat in low-fat products.

Heat and acid sensitivity: Stable at high pasteurization temperatures, but may clump, curdle, or separate if the product becomes too acidic.

Water absorption: Absorbs water well but thickens over time, which can contribute to hardening in protein bars or increased viscosity in beverages.

Aggressive blending required: Requires consistent mixing; if not properly hydrated in warm water during manufacturing, it leaves behind visible, undissolved white specks.

SOY PROTEIN: BEANY NOTES, TEXTURE CONSIDERATIONS

Soy protein remains a foundational global source in plant-based formulations, anchoring roughly one-in-six North American launches, but it introduces distinct sensory compromises.

Flavor profile: Carries a highly recognizable “beany,” green, and paint-like off-note driven by natural enzymes, paired with a lingering bitter aftertaste that often requires masking.

Texture: While more soluble than pea, soy can still leave a film or residue without oversight of processing temperatures and pH levels.

Thickening power: Possesses gelling and water-binding properties, which can affect texture in foods or drinks.

Visual appearance: Imparts a noticeable tan or off-white hue which can mute the color of food and beverage bases.

Identify the Sensory Challenge

Your protein source is only part of the formulation equation. Protein concentration, processing conditions and the finished application can amplify sensory effects. Before selecting a flavor solution, identify the primary challenge.

Bitterness and off notes may compete with the intended flavor profile, while astringency can leave a dry or puckering sensation. Chalkiness and grittiness affect mouthfeel, and excessive viscosity can change the overall eating or drinking experience.

Increasing the flavor usage rate won’t address every sensory challenge. Understanding what needs correction helps determine whether your formula would benefit from flavor, taste modulation, or broader adjustments.

Match the Solution to the Sensory Challenge

When you are trying to improve the taste of a high protein shake or a nutrition bar, adding chocolate or vanilla flavors provides natural masking characteristics that can help. Brands that incorporate plant-based proteins or high protein content may benefit from a combination of flavor and taste modulators to achieve a balanced taste experience.

Human flavor perception is a team effort between your nose and your tongue. High protein ingredients can affect both senses.

Evaluate the Complete Eating or Drinking Experience

Multiple sensory signals determine how you experience a high protein food or drink. When formulating with proteins, changing one variable like the protein source can alter perceptions of sweetness, flavor, mouthfeel, and finish.

SWEETNESS

Protein and other functional ingredients can alter sweetness perception and timing. Determine whether sweetness supports the intended flavor profile from first taste through finish.

FLAVOR

Protein-related notes may become more apparent over shelf life. Evaluate whether the intended flavor character remains recognizable and balanced over time.

MOUTHFEEL

Chalkiness, grittiness and excessive viscosity can undermine an otherwise appealing flavor experience. Consider texture alongside flavor during sensory evaluation.

FINISH

Bitterness, astringency and lingering off-notes can become noticeable after swallowing. Review what remains after the primary flavor character fades.

High Protein Formulation Decisions Extend Beyond Flavor

Developing high protein foods and drinks often takes cross-functional alignment, because boosting protein content can affect nutritional claims and raw material costs.

Beyond the technical challenges, higher protein formulas can require sourcing of additional ingredients. Ingredient and formulation choices can also affect clean-label positioning and the texture experience promised to shoppers.

Let’s Discuss Your High Protein Sensory Challenges

High-protein formulation doesn’t require choosing between nutritional targets and an appealing sensory experience. Understanding how the protein source affects taste, texture and finish can help you identify the right flavor and taste modulation approach.

Our flavorists and applications scientists can help you build a product that stands out for the right reasons and keeps shoppers coming back. Contact us for flavor samples and a collaborative discussion.