Identifiers
Brazzein is used as a high-intensity sweetener in food, beverage, pharmaceutical, and cosmetic applications, and as a flavor modifier at sub-sweetness thresholds. In sweetener blends, it is combined with thaumatin, rebaudioside M, or rare sugars to improve sweetness and mask bitterness. It also functions as a weight-loss active in dietary supplements, with claims of reducing fat-induced weight gain and alleviating insulin resistance. Below its sweetness recognition threshold, it enhances juicy, fruity, or sweet brown flavors in food products and beverages.
Brazzein addresses the need for high-intensity sweetness with reduced caloric and glycemic impact compared to sugar. It solves formulation challenges such as bitterness in rare sugars, lingering sweet aftertaste, and slow sweetness onset by blending with other sweeteners or flavor agents. It also provides a solution for improving sweetness without altering texture or flavor, and for maintaining sweetness in the presence of tannins or during heating when combined with stabilizers like cyclodextrins or polysaccharides.
Evidence for brazzein's main uses comes from patent applications describing its role as a sweetener in blends with thaumatin, rebaudioside M, and rare sugars, and as a flavor modifier below sweetness thresholds. Patents also claim weight-loss and insulin-resistance benefits. Regulatory information is limited: brazzein is not listed on the US TSCA Inventory, indicating it is a new chemical requiring a PMN for certain uses. No approved food-additive status or clinical trial data were provided.
Key trade-offs include thermal instability, which can be mitigated by cyclodextrins, and sweetness intensity modulation, which can be enhanced by monovalent or divalent salts. Brazzein's sweetness onset and lingering aftertaste can be improved by blending with other sweeteners. It may require polysaccharides to maintain activity in tannin-containing matrices. Dosage is critical: below ~10 ppm it acts as a flavor modifier, while higher concentrations provide sweetness. These trade-offs require careful formulation to balance stability, intensity, and sensory profile.
| Property | Value | Category |
|---|---|---|
| molecular size / peptide length | single polypeptide chain of about 54 amino acid residues (approximately 0.4 kDa) | Analytical Properties |
| solubility in water | very water soluble; solubility reaches 50 mg/ml | Analytical Properties |
| pH stability range | stable over a broad pH range from 2.5 to 8, 2.5 to 8 | Analytical Properties |
| heat stability | heat stable at 80 °C for 4 h (and retains sweetness after heating), 98 °C (208 °F) for 2 hours | Analytical Properties |
| relative sweetness vs sucrose | approximately 1500 times sweeter than sucrose (various comparisons 500x at 10% sucrose and 2000x at 2% sucrose mentioned) | Analytical Properties |
| monomer protein length (amino acids) | 54 | Analytical Properties |
| number of disulfide bonds | 4 | Analytical Properties |
| sweetness relative to sucrose (weight basis) | 500 to 2000 times sweeter (on a weight basis) | Analytical Properties |
| molecular mass | 6.5 kDa, 22 kDa | Analytical Properties |
| isoelectric point | 12 | Analytical Properties |
A useful benchmark is sucrose equivalence, as brazzein is often formulated to match the sweetness of 2–6 wt% sucrose solutions. In such systems, brazzein is used at very low concentrations (e.g., 15–160 ppm) and may be combined with bulk sweeteners to achieve target sweetness. Unlike sucrose, brazzein provides negligible calories and a different temporal profile, which can be adjusted with cyclodextrins or salts. This benchmark helps formulators dose brazzein to replace sugar while managing sensory differences.