NEOTAME

CAS: 165450-17-9 FLAVOR ENHANCER, NON-NUTRITIVE SWEETENER

Neotame is a high-intensity, non-nutritive sweetener and flavor enhancer used in foods and beverages. It is intensely sweet, chemically stable in many applications, and approved for use by major food safety agencies with established safety evaluations.

What It Is

Neotame is a chemically synthesized high-intensity sweetener and flavor enhancer defined as N-[N-(3,3-dimethylbutyl)-L-alpha-aspartyl]-L-phenylalanine 1-methyl ester with the CAS registry number 165450-17-9. It belongs to a class of intense sweeteners that are used to provide sweet taste without contributing significant calories. Chemically, it is related to aspartame but includes modifications that greatly increase its sweetness potency compared to sucrose and traditional nutritive sweeteners. Neotame is used in food and beverage applications to replace sugar or enhance flavor profiles, particularly in reduced-calorie and sugar-reduced formulations. The compound exists as a white to off-white powder in its purified form and is sparingly soluble in water but more soluble in certain organic solvents. As a value-added ingredient, it functions effectively at very low concentrations due to its intense sweetness profile. Neotame’s chemical structure and properties are such that it does not contribute to the energy content of the final food product at the levels used for sweetening or flavor enhancement, aligning with the needs of manufacturers seeking to offer low-calorie options.

How It Is Made

The manufacturing of neotame involves a targeted chemical synthesis process that combines aspartame with 3,3-dimethylbutyraldehyde, typically in the presence of a hydrogenation catalyst under controlled conditions. The process begins with a reductive alkylation where the carbonyl group of the aldehyde reacts with the amino groups of aspartame, forming the characteristic neotame molecule. After the initial reaction phase, purification steps such as solvent removal, washing, and drying are used to isolate the neotame product in a stable, dry powder form. These stages follow well-defined food additive production practices to achieve high purity and to remove residual reactants or by-products. Producers adhere to stringent quality control measures and purify neotame to meet regulatory specifications that define assay limits and acceptable levels of related substances. Purity testing often includes chromatographic methods to verify that assay results fall within defined ranges. While proprietary aspects of manufacturing may vary among suppliers, the core principles align with established food chemistry manufacturing protocols that are used for peptide ester–based sweeteners. The methods used for synthesis and purification are designed to minimize contaminants and ensure the consistency of the ingredient for food formulation use.

Why It Is Used In Food

Neotame is used in food products primarily because of its intense sweetening power and its functional versatility compared with conventional caloric sweeteners like sucrose. Its potency allows formulators to achieve desired sweetness with minimal quantities, which supports the development of low-calorie and reduced-sugar products that appeal to health-conscious consumers. In addition to sweetness, neotame also serves as a flavor enhancer in formulations where subtle improvements to overall flavor balance are desired. This dual role makes it attractive for inclusion in beverages, confections, tabletop sweeteners, baked goods, and other consumer foods. Food manufacturers often leverage neotame’s stability and lack of off-notes at typical use levels to replace sugar in products where texture and mouthfeel can be maintained through other ingredients. Because neotame contributes negligible calories and does not ferment like some sugars, it is also suitable for applications where sugar reduction is a key performance criterion, such as in diet soft drinks, sugar-free chewing gum, and sugar-reduced desserts. The blendability of neotame with other sweeteners or bulking agents allows flexibility in formulation design, resulting in consistent and desirable sweetness outcomes across a range of products.

Adi Example Calculation

To illustrate how an ADI might be applied in practice, consider a hypothetical adult weighing 70 kilograms. If a regulatory body sets an ADI of 10 milligrams per kilogram of body weight for neotame, multiplying this value by the body weight gives a total of 700 milligrams per day as the theoretical maximum acceptable intake. This example is solely illustrative and does not imply that individuals should target or approach this intake level. Actual intake from foods is typically far lower because neotame is used at very low concentrations due to its high potency. This calculation underscores how regulators use ADIs to create safety margins that account for lifetime exposure and sensitive subpopulations. It also highlights that ADIs are guidance values constructed with conservative assumptions to ensure public health protection.

Safety And Health Research

Safety evaluations of neotame have been conducted by major international food safety bodies to characterize its toxicological profile and ensure that use in foods does not pose undue risk. These evaluations rely on data from animal studies covering acute, subchronic, and chronic exposures with various endpoints including general toxicity and carcinogenicity. Regulators examine absorption, distribution, metabolism, and excretion pathways to understand how neotame and its metabolites behave in biological systems. In the context of regulatory review, no adverse effects have been identified at exposures relevant to anticipated dietary intakes when neotame is used in food products according to established guidelines. Studies reviewed in these evaluations inform acceptable daily intake levels and help regulators set appropriate safety margins. The focus of these reviews includes the compound’s biochemical behavior, potential for genotoxicity, and relevance of any observed findings to human health risk. Collectively, the body of evidence supports the conclusion that neotame can be included in foods as a non-nutritive sweetener without presenting safety concerns at authorized use levels. As with most regulatory evaluations, ongoing scientific monitoring and periodic re-evaluation ensure that the safety assessments remain aligned with current scientific understanding.

Regulatory Status Worldwide

Neotame is authorized for use as a food additive in multiple regulatory jurisdictions around the world. In the United States, its use is codified in Title 21 of the Code of Federal Regulations, section 172.829, which permits neotame as a sweetening agent and flavor enhancer in foods generally, except in meat and poultry, in accordance with current good manufacturing practice. This regulatory provision also outlines purity specifications that must be met for neotame to be used safely in food products. It reflects a formal safety evaluation by the U.S. Food and Drug Administration that concluded neotame’s use in foods at levels reasonably required to achieve its intended effect is safe. Within the European Union, neotame has been assigned the E number E961 and has undergone re-evaluation by the European Food Safety Authority, which reaffirmed its safety for use as a food additive. The regulatory status in the EU allows its use in defined food categories under the regulatory framework that governs food additives, and ongoing assessments inform any updates to specifications or permitted uses. Internationally, neotame appears on the FAO/WHO JECFA list of evaluated food additives with an assigned INS number, supporting its inclusion in the global food additive inventory. Many other countries follow these authoritative evaluations when setting national regulations for intense sweeteners and flavor enhancers.

Taste And Functional Properties

Neotame exhibits an intensely sweet taste with sensory characteristics described as clean and reminiscent of sucrose without strong bitter or metallic aftertastes at appropriate use levels. Its sweetness potency is significantly higher than sucrose, and on a per-weight basis it is effective at concentrations that are orders of magnitude lower than traditional sugars. In practice, this means that only trace amounts are needed to impart the desired sweetness, minimizing potential impacts on texture or other sensory attributes in the final food product. Functionally, neotame’s stability under a variety of processing conditions, including moderate heat, allows its incorporation into baked goods and other foods that undergo thermal treatments. While its solubility in water is limited compared to simple sugars, it is adequate for most beverage and liquid applications when used in conjunction with solvents or co-solutes. Neotame is not fermentable by cariogenic oral bacteria, and its intense sweetness enables formulators to achieve targeted flavor profiles with minimal additive concentrations. These functional properties make neotame a versatile ingredient in modern food science.

Acceptable Daily Intake Explained

An acceptable daily intake (ADI) is a health-based guidance value that represents an estimate of the amount of a substance that can be consumed daily over a lifetime without appreciable health risk. For food additives such as neotame, regulatory bodies derive ADIs by identifying a no-observed-adverse-effect level (NOAEL) from toxicological studies and then applying safety factors to account for uncertainties in extrapolating animal data to humans. This approach ensures that the ADI is set at a level protective of public health. For neotame, different authoritative bodies have established ADI values based on their respective evaluations. An ADI provides a reference point for assessing the safety of dietary exposures across population groups and is not intended as a recommended intake. It should be interpreted within the context of overall diet and use patterns of the additive across food categories. ADI values support regulatory decisions about allowable uses and inform risk assessors and manufacturers in safety planning and product formulation.

Comparison With Similar Additives

Neotame shares functional similarities with other high-intensity sweeteners such as aspartame, sucralose, and acesulfame potassium. Compared with aspartame, neotame is significantly more potent, meaning much smaller amounts are needed to achieve equivalent sweetness. This high potency can be advantageous in formulations but also requires careful blending to achieve desired sweetness profiles. Sucralose, another intense sweetener, is chemically distinct and known for its stability under heat, making it suitable for applications that involve baking or high-temperature processing. Acesulfame potassium is often used in combination with other sweeteners to balance taste profiles and mask lingering aftertastes. Each of these sweeteners has unique functional attributes that influence their use in food formulation. Aspartame is widely used in beverages but is less stable at higher temperatures compared with sucralose. Acesulfame potassium contributes a clean, fast sweet onset and is frequently combined with other sweeteners for synergistic effects. The choice among these additives depends on product-specific requirements, desired taste outcomes, processing conditions, and regulatory approval in target markets.

Common Food Applications Narrative

Neotame is featured in a wide array of consumer food and beverage products where low-calorie, sugar-reduced, or sugar-free labeling is desired. In the beverage industry, it is used in soft drinks, ready-to-drink teas, and flavored waters where conventional sugars are reduced or eliminated to meet consumer demand for reduced-calorie alternatives. In confectionery, neotame contributes to the sweetness of sugar-free chewing gums, hard candies, and coated tablets where a stable sweet profile is needed. In dairy and dairy-alternative products, such as flavored yogurts and dessert-style items, neotame supports the formulation of reduced-sugar options without compromising key sensory attributes. Bakery products, including muffins and snack bars, benefit from its heat stability when combined with bulking agents or polyols to maintain structure while reducing sugar content. Tabletop sweeteners designed for consumer use in home beverage preparation often employ neotame, either alone or in blends with other intense sweeteners, to provide convenience and sweetness intensity. Other segments, such as tabletop crystal sweeteners, sugar-free syrups, and reduced-calorie gelatins or puddings, use neotame to maintain consumer-expected flavor in sugar-reduced products. Across these applications, neotame’s intense sweetness and functional neutrality enable manufacturers to deliver products that align with modern dietary preferences.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.829

EFSA

  • Approved: True
  • E Number: E961
  • Adi Display: 10 mg/kg bw per day
  • Adi Mg Per Kg: 10

JECFA

  • Year: 2003
  • Ins Number: 961
  • Adi Display: 0-2 mg/kg bw
  • Adi Mg Per Kg: 2

Sources

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