LACTALBUMIN

CAS: 9013-90-5 FORMULATION AID, NUTRIENT SUPPLEMENT, PH CONTROL AGENT

Lactalbumin is a whey‑derived milk protein used as a formulation aid and nutrient supplement in foods and beverages, evaluated in food safety contexts but without a formal numeric ADI from major regulators in publicly accessible records.

What It Is

Lactalbumin is a protein fraction derived from milk whey and is classified within the broader group of milk albumins. It is characterized chemically by its peptide nature and biological origin, and the descriptor "lactalbumin" often refers to the predominant alpha form of this protein class. Although the term appears across scientific literature to describe milk proteins, in food science and formulation contexts lactalbumin functions as a nutrient supplement and formulation aid rather than an artificial chemical additive. In the context of food ingredient labeling and regulatory frameworks, lactalbumin is recognized by its CAS Registry Number 9013‑90‑5, which identifies the substance across chemical and regulatory databases. The protein may be isolated from whey using fractionation and separation techniques, yielding a product that retains the native structure of the protein. Technically, lactalbumins can include multiple isoforms depending on source and processing history, and the primary alpha form is often referred to specifically in literature and regulatory submissions. The role of lactalbumin within food systems stems from its functional properties as a protein, contributing to nutritional profiles and influencing texture and pH behavior in complex food matrices. As a naturally occurring milk component, it is encountered in dairy and dairy‑derived products, and is used in specialized formulations where high‑quality protein content or particular functional performance is desired.

How It Is Made

Commercial lactalbumin used in food and beverage formulations is typically produced from whey, a liquid by‑product of cheese and casein manufacture. Whey contains a mixture of soluble proteins, including both beta‑lactoglobulin and alpha‑lactalbumin. The process of isolating lactalbumin may involve pH adjustments to precipitate unwanted proteins, membrane filtration to fractionate protein classes based on size, ion exchange to promote selective binding and elution of specific proteins, and spray drying to convert purified protein solutions into stable powders. Membrane separation techniques, such as ultrafiltration and microfiltration, are widely employed in the dairy ingredient industry to concentrate whey proteins and separate them from lactose and minerals. These processes are physical in nature and do not require chemical modification of the protein structure; rather, they exploit differences in molecular size and charge to achieve separation. Ion exchange chromatography can further refine the protein fraction to enrich for lactalbumin relative to other whey proteins. After isolation, the concentrated lactalbumin solution is typically dried under controlled conditions to yield a powder suitable for incorporation into food products. The production processes are performed under current good manufacturing practices (cGMP) appropriate for food ingredients, and the resulting powders are subject to specifications for protein content, microbiological quality and absence of contaminants. The processes used to produce food‑grade lactalbumin are aligned with industry and regulatory expectations for food proteins, and documentation of manufacturing specifications is part of regulatory submissions for safety evaluations.

Why It Is Used In Food

Lactalbumin is used in food and beverage formulations primarily because of its high biological value as a source of essential amino acids and its functional performance in complex product systems. As a nutrient supplement, it contributes to the protein content and overall amino acid quality of nutritional products, beverages, and specialized food formulations such as sports nutrition, meal replacements, and fortified foods. From a formulation perspective, lactalbumin can affect solubility, emulsification and textural characteristics of products. Because it interacts with other components such as water, lipids and carbohydrates, food scientists use lactalbumin to improve uniformity and stability in multi‑component systems. For example, in beverage systems requiring protein enrichment without excessive viscosity, the selection of specific protein fractions such as lactalbumin can modify mouthfeel and stability without the need for synthetic stabilizers. In addition, food formulators may choose lactalbumin for its relatively neutral flavor profile compared to other protein isolates, which supports inclusion in products where off‑notes or strong tastes are undesirable. Its use in nutritional formulations for infants, adults and active individuals reflects the demand for proteins that combine acceptable sensory characteristics with nutritional benefits. Lactalbumin may therefore be selected to balance nutritional enhancement with desirable textural and sensory properties, particularly in products marketed for higher protein content.

Adi Example Calculation

Because lactalbumin does not have a numeric Acceptable Daily Intake (ADI) established in accessible food additive regulatory listings such as JECFA or EFSA records, a numerical example illustrating an ADI calculation cannot be provided here. In contrast, for additives with defined numeric ADIs, illustrative calculations demonstrate how a person’s body weight and product consumption influence exposure relative to the ADI. For example, if an additive had an ADI of X mg per kg of body weight per day, a 70‑kg adult would have an ADI threshold of 70X mg per day. In the absence of a specific numeric ADI for lactalbumin, safety evaluations focus on historical consumption, protein nutritional contribution and regulatory determinations such as GRAS status in the United States. Regulatory evaluations for ingredients like lactalbumin emphasize that the expected dietary exposure under intended use conditions does not raise concerns based on available scientific evidence. Illustrative calculations for ingredients lacking numeric ADIs are not provided because there is no numeric benchmark against which exposure is compared.

Safety And Health Research

Safety evaluations of lactalbumin in food contexts focus on the protein’s history of consumption, source material, and evidence from clinical and food science literature. As a naturally occurring component of milk and whey, proteins of this class have a long history of dietary exposure. Regulatory evaluations, such as GRAS determinations in the United States, consider published studies, analytical data and exposure estimates when assessing potential risks under intended conditions of use. These evaluations typically examine the protein’s digestibility, absence of toxic impurities, and the body of scientific literature relating to safety. Research in nutritional science often explores the digestion and absorption of protein fractions, including lactalbumin, to understand their role in human nutrition. Because lactalbumin is rich in essential amino acids and has biological value comparable to other high‑quality proteins, its nutritional contribution is emphasized in contexts such as infant formula and sports nutrition. Studies in food science may also investigate how processing conditions affect protein structure and interactions with other food components, which can influence functional performance in food systems. While lactalbumin and related whey proteins have been studied in clinical settings for various outcomes, definitive physiological health claims specific to lactalbumin, such as effects on metabolic conditions, require rigorous controlled trials and are not part of regulatory safety assessments in this context. Regulatory safety evaluations remain focused on ensuring that the ingredient can be used without unreasonable risk under the stated conditions, and do not extend to therapeutic claims. Published research exploring functional properties of lactalbumin in vitro and in vivo contributes to a broader understanding of protein behavior in nutrition but does not itself constitute regulatory endorsement of specific health effects.

Regulatory Status Worldwide

Lactalbumin, as a protein fraction of milk whey, has been the subject of regulatory evaluations in major jurisdictions. In the United States, lactalbumin has been the focus of Generally Recognized as Safe (GRAS) notifications submitted to the U.S. Food and Drug Administration (FDA). For example, determinations of GRAS status for alpha‑lactalbumin for specific uses in food categories have been acknowledged in FDA filings, indicating that premarket approval is not required under the Federal Food, Drug, and Cosmetic Act for the intended uses described in those notices. This reflects a regulatory conclusion that, based on scientific procedures, the use of lactalbumin in specified food products does not raise safety concerns when used as intended (see deep link in sources). At the international level, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) maintains databases and specifications for food additives evaluated by the committee. While the searchable database can be queried by CAS number or name, a specific monograph for lactalbumin has not been identified in publicly accessible JECFA specification compilations at the time of writing, and numeric Acceptable Daily Intake (ADI) values have not been presented in these records. JECFA’s role as an international authority on food additive safety provides a framework for understanding how protein additives may be assessed, but without a specific entry showing ADI or INS numbers for lactalbumin, these fields remain undefined. In the European Union, authorized additives are listed in the Union list of food additives maintained by the European Commission. Databases such as the EU food additive database provide tools to check whether a given substance is permitted and under what conditions, but specific listing and E‑number designation for lactalbumin were not found in the publicly accessible records at the time of this writing, and therefore cannot be confirmed here. In jurisdictions beyond these, regulatory status may vary and is dependent on local food safety authorities’ determinations regarding the use of milk‑derived proteins in food products.

Taste And Functional Properties

Lactalbumin contributes minimal taste impact on its own, often described as having a mild, neutral profile that does not dominate the overall flavor of a formulation. This relatively subdued taste property makes it useful in products where additional flavors are desirable, such as flavored beverages, bars and other fortified foods. Its functional behavior in solution reflects its nature as a protein: it can help improve the mouthfeel and perception of fullness in enriched beverages and foods. From a functional standpoint, lactalbumin exhibits solubility in aqueous systems, which is influenced by pH, ionic strength and temperature. At pH values near its isoelectric point, solubility decreases, whereas at pH values distant from the isoelectric point, greater solubility supports integration into drinks and aqueous gels. Heat stability is an important consideration in thermal processing; proteins such as lactalbumin can undergo structural changes when exposed to high temperatures, and formulation strategies seek to preserve functional properties while maintaining product stability. Across different applications, lactalbumin can assist in emulsification by helping to stabilize oil‑in‑water interfaces, although it is not typically the primary emulsifier in most formulations. Its contribution to viscosity and gelation depends on concentration and interactions with other proteins and hydrocolloids in a given system. In practice, formulators adjust processing conditions and complementary ingredients to achieve the desired balance of texture, clarity and stability, relying on lactalbumin’s inherent protein functions to support product performance.

Acceptable Daily Intake Explained

An Acceptable Daily Intake (ADI) is a regulatory concept used by some food safety authorities to describe the amount of a substance that can be consumed daily over a lifetime without appreciable health risk. ADIs are typically expressed in mg of substance per kg of body weight per day and are established based on toxicological data and safety factors. For many food additives, especially synthetic chemicals, numeric ADIs are defined by bodies such as JECFA or EFSA when sufficient toxicological data are available. In the case of lactalbumin, no numeric ADI has been identified in publicly accessible food regulatory databases for this protein ingredient. This absence does not imply that lactalbumin is unsafe; rather, it reflects the nature of this protein as a food component with a long history of dietary exposure and existing evaluations under GRAS or similar safety frameworks. For ingredients like lactalbumin derived from food proteins, regulators often rely on compositional and exposure data rather than defining numeric ADIs, particularly when standard protein metabolism and nutritional contribution are considered part of normal dietary patterns. When numeric ADIs are established for other additives, regulators apply conservative safety factors to account for uncertainty and inter‑individual variability. Consumers and formulators should understand that ADIs are regulatory tools and do not represent recommended intakes; they serve as benchmarks used in safety assessments to ensure that chronic exposure remains below levels considered to pose risk.

Comparison With Similar Additives

Lactalbumin may be compared with other proteinaceous food ingredients that serve similar formulation and nutritional roles. For example, whey protein concentrate and whey protein isolate are protein ingredients derived from whey, like lactalbumin, but differ in composition. Whey protein concentrate contains a broader mixture of whey proteins, including beta‑lactoglobulin, whereas whey protein isolate is processed to reduce fat and lactose and increase overall protein content. Lactalbumin, in contrast, is a fraction enriched for the alpha component of whey proteins. Caseinates, another class of milk proteins derived from casein rather than whey, serve as functional ingredients in food formulation. Caseinates contribute different textural characteristics compared to whey proteins because of their distinct structural properties, and they are often used where gelation or specific mouthfeel qualities are needed. Plant protein isolates, such as soy protein isolate or pea protein isolate, offer alternative protein sources with different solubility and sensory profiles. Compared to these plant‑derived proteins, lactalbumin and other dairy proteins may offer differences in amino acid profiles, digestibility and functional performance in specific applications. While these protein ingredients share the common characteristic of contributing protein and supporting functional properties in food systems, their differences in composition and behavior under processing conditions inform their selection in specific formulations. Lactalbumin’s relatively neutral taste and specific solubility characteristics distinguish it from broader protein concentrates or non‑dairy alternatives, guiding formulators in choosing the right ingredient for the desired product attributes.

Common Food Applications Narrative

In food and beverage development, lactalbumin is encountered in a range of applications where a high‑quality protein source is desired alongside functional performance. In nutritional beverages designed for athletes and individuals seeking enhanced protein intake, lactalbumin contributes to protein density while supporting clarity and texture that meets consumer expectations for drinkability. Its relatively neutral taste profile allows it to be combined with flavor systems without creating off‑flavors. Bakery products and bars formulated for higher protein content often incorporate lactalbumin as part of a protein blend. In such products, the protein component can help support texture and structure, influencing crumb formation and moisture retention. Lactalbumin’s solubility characteristics may also be advantageous in powdered mixes intended for reconstitution, where protein dispersibility influences the final product quality. Specialized nutritional products, including fortified snacks and meal replacements, use lactalbumin to meet protein targets while managing sensory attributes. In dairy and non‑dairy formulations seeking to balance protein enrichment with desirable mouthfeel, lactalbumin can be paired with other proteins and hydrocolloids to achieve a harmonious sensory experience. Across these applications, lactalbumin’s functional versatility supports its inclusion in products that target protein fortification without compromising consumer acceptance.

Safety & Regulations

FDA

  • Notes: Lactalbumin is subject to GRAS determinations for intended uses but no specific CFR section was confirmed in d sources.

EFSA

  • Notes: No explicit EFSA additive listing or E number for lactalbumin was found in accessible EU additive database records.

JECFA

  • Notes: No specific JECFA numeric ADI or INS designation was identified in publicly accessible JECFA database records.

Sources

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