Cyclodextrin Derivatives in Food: Structure, Safety, and Functional Applications
INQUIRY
Cyclodextrin (CD) derivatives are toroidal-shaped cyclic oligosaccharides produced by enzymatic conversion of starch followed by chemical or enzymatic modification. The unique structure of CDs, featuring a hydrophobic inner cavity and a hydrophilic outer surface, enables the encapsulation of hydrophobic guest molecules, resulting in various functionalities.
Alfa Chemistry offers a comprehensive portfolio of cyclodextrin derivatives for food manufacturers seeking to enhance the stability, bioavailability, and sensory attributes of active ingredients.
Structural Characteristics of Cyclodextrin Derivatives
CDs are classified as α-CD, β-CD, and γ-CD, based on the size of the cavity, with six, seven, and eight glucopyranose units, respectively. The chemical modification of hydroxyl groups at C-2, C-3, and C-6 positions leads to numerous derivatives with tunable solubility, selectivity, and binding affinities. Water-soluble derivatives such as hydroxypropyl-β-CD (HP-β-CD) or sulfobutylether-β-CD provide improved encapsulation of hydrophobic nutrients, while hydrophobic or ionic CDs enable novel interactions with lipid matrices and charged compounds. This structural diversity allows precise tailoring of guest–host interactions for diverse food applications.
Fig.1 Basic classification and structural characteristics of cyclodextrins[1].
Regulatory Standards for Cyclodextrin Derivatives in Food Applications
Regulators around the world have varying standards for the permitted levels of cyclodextrin derivatives in food to ensure food safety. Alfa Chemistry has compiled the permitted levels of natural cyclodextrins in food in different countries/regions in the table below for your reference.
Table 1: Permitted levels of cyclodextrins in food in different countries[1].
| Country/Region | α-CD | β-CD | γ-CD | HP-β-CD |
| U.S. FDA | Baked goods, beverages, dairy products (≤5 g/serving) | Encapsulate active ingredients (1.5–5% w/w) | Improve texture & stability (2–5% w/w) | Baked goods, beverages, dairy products (≤5% w/w) |
| EFSA | Dietary fiber supplement (<0.1 g/kg body) | Food additive (≤2.5 g/kg food) | Food ingredient (≤8 g/kg food) | Food additive (≤8 g/kg food) |
| CFDA | Dietary fiber supplement (≤5 g/kg food) | Encapsulate actives & improve texture (≤1–3% w/w) | Food additive (≤2–5% w/w) | Baked goods, beverages, dairy products (≤1–3% w/w) |
How do cyclodextrin derivatives enhance the delivery of bioactive compounds in food?
Cyclodextrin derivatives form inclusion complexes with polyphenols, vitamins, carotenoids, and other bioactive compounds, improving their solubility, chemical stability, and sensory properties. For example, curcumin encapsulated in β-cyclodextrin or hydroxypropyl-β-cyclodextrin achieves over 90% encapsulation efficiency and significantly improves color stability and antioxidant potential. Hydroxypropyl-β-cyclodextrin encapsulation of resveratrol enhances its cellular reactive oxygen species scavenging capacity and ocular bioavailability, demonstrating its potential as a functional food for eye health. Sulfobutyl ether-cyclodextrin has been shown to encapsulate tea polyphenols with up to 98% encapsulation efficiency and maintain DPPH and ABTS free radical scavenging activity at low concentrations. These delivery systems can extend shelf life, achieve controlled release, and protect sensitive compounds during processing and digestion.
Fig.2 The schematic representation of inclusion complex formation between CUR and β-CD molecules[2].
What role do cyclodextrin derivatives play in flavor preservation and off-flavor masking?
Cyclodextrin derivatives selectively coat volatile compounds, such as essential oils, aldehydes, or terpenes, enabling manufacturers to retain desired aromas or suppress unpleasant odors. For example, α-cyclodextrin (α-CD) effectively reduces the pungent odor of allicin, while β-cyclodextrin (β-CD) enhances the stability and solubility of onion or garlic oils, minimizing strong odors. HP-β-cyclodextrin (HP-β-CD) stabilizes bitter or pungent odors, improving overall palatability. This property facilitates the development of healthier products, such as plant-based proteins, without compromising taste.
Fig.3 Docking image of allicin and α-CD[3].
Table 2: Application of cyclodextrin derivatives in reducing food off-flavors[4].
| CDs | Odorants | Treatments | Results |
| β-cyclodextrin | Bean aroma | 60°C, 0.75% β-cyclodextrin | The beany flavor was reduced by approximately 57%. |
| β-cyclodextrin | Beany, bitter, chalky, cardboard, astringent, roasted, nutty, and grainy | SPI (50 g/L), PLA 2 (2 μkat PLA 2 /g), SPI, β-CD concentration (10 mM), pH 8.0, 43°C, 3 hours | The phospholipid removal efficiency was 95.3%. |
| β-cyclodextrin | Bean aroma | ISP (5%, w/w), and β-CD (4%, w/w), heated to 90°C and incubated in a 90°C water bath for 15 minutes, then cooled to 10°C. | The relative peak area of hexanal was reduced by approximately 4%. |
| β-cyclodextrin and γ-cyclodextrin | Bean aroma | 100 U/g starch CGT was added to the TVP matrix and incubated at 60°C for 2 hours. | The primary fragment ions of n-hexanal, 1-octen-3-ol, and benzaldehyde were 56, 57, and 77 m/z, respectively, which were lower than those in the untreated patties. |
| β-cyclodextrin | Goaty | 1.00% β-CD was added to ice cream samples and freeze-dried at 48°C under 0.032 mbar pressure for 96 hours. | Addition of β-CD increased the ash and crude protein content of the ice cream, enhanced its melt resistance, and reduced its overrun. |
| β-cyclodextrin | Goaty | 6 g/kg β-CD was added to pretreated raw goat milk and heated at 40°C in a constant temperature water bath for 30 minutes. | The contents of propionic acid, octanoic acid, and decanoic acid were significantly reduced. |
| β-cyclodextrin | Fully ripe | Acid:β-cyclodextrin (0.1 M) 1:0.5 | Caprylic acid concentrations decreased by 84.61%, and hexanoic acid concentrations decreased by 83.14%. |
| β-cyclodextrin | Bitter | Add 1.5% β-CD, pH 3.5, and 2 g/L stevia powder. | Compared to the control, these exhibited the highest scores or sensory acceptability. |
| β-cyclodextrin | Cooking flavors | β-CD concentration: 0.2%, then filtered through a 0.45 μm filter. | T&β-CD reduced octanol and (E)-2-decenal concentrations by 22.81% and 28.19%, respectively. |
| α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin | Smoke taint | 25 g/L of α-CD, β-CD, and γ-CD were dissolved in the mixture. | Guaiacol removal reached 30%. |
| β-cyclodextrin and γ-cyclodextrin | Bushfire smoke and microbial spoilage | Hexamethylene diisocyanate (HDI) was used as a crosslinker at a ratio of 1% w/v, at 25°C for 5 minutes. | CD polymer removed 45–77% of volatile phenols. |
| β-cyclodextrin | Bitter fishy | 2-Butanol was added at a ratio of 1:4 (w/v) for 20 minutes, and β-CD was added at a ratio of 1:1 (w/w) for 30 minutes. | This resulted in greater removal of bitter peptides with hydrophobic/aromatic amino acids and lower bitterness scores. |
| β-cyclodextrin | Bitter fishy | 3% β-CD v/w, at 50°C for 30 minutes. | Acetic acid and nonanal were reduced by 90% and 96%, respectively. |
How are cyclodextrin derivatives used to remove undesirable substances in food processing?
Cyclodextrin derivatives are widely used to reduce cholesterol in eggs and dairy products, lower the free fatty acid content of oils and fats to improve frying stability, and remove phenolic compounds or polyphenol oxidase from fruit juices, thereby inhibiting enzymatic browning. They can also form complexes with intense sweeteners, such as steviol glycosides or aspartame, enhancing sweetness stability and masking unpleasant aftertastes in beverages.
How do cyclodextrin derivatives contribute to smart and sustainable food packaging?
Due to their biodegradability and functional versatility, cyclodextrin derivatives are being incorporated into biopolymer matrices (gelatin, polylactic acid, and alginate) to develop active smart packaging materials. β-cyclodextrin combined with black pepper oleoresin enhances the antioxidant activity of films; HP-β-cyclodextrin combined with guava leaf oil provides longer-lasting antioxidant protection; and γ-cyclodextrin combined with zein imparts antimicrobial activity through controlled release of thymol. These packaging systems can improve food safety, extend shelf life, and support the food industry's environmental initiatives.
Table 3. Examples of research on the use of cyclodextrin derivatives in food packaging[1].
| CDs | Functional ingredients | Functional Features |
| β-CD | Black pepper oleoresin | Enhanced antioxidant activity |
| Hydroxypropyl- beta- CD | Guava leaf oil | Enhanced antioxidant activity |
| Methylated β-CD | Essential oils | Keeping antioxidant activity |
| Propylene diamine β-CD | Flavonoids | Enhanced antioxidant activity |
| Sulfobutylether-β-CD | Eqoul | Enhanced antioxidant activity |
| Triacetyl-β-CD | Allyl isothiocyanate | Extended-release time of active ingredients, antibacterial effect |
| γ-Cyclodextrin and zein | Thymol | Antibacterial effect |
| Hydroxypropyl-β-cyclodextrin | dihydromyricetin | Reduced lipid oxidation and microbial growth |
| β-CD and polylactic acid/polycaprolactone | Oregano essential oil | Anti-bacterial and anti-fungal ability |
| β-CD and Gelatin | Curcumin | Improved antioxidant activity and stability |
| Hydroxypropyl-γ-CD | Resveratrol | Antibacterial activity |
| γ-CD and gelatin | Carvacrol | Inhibition of microbial growth |
Fig.4 Different strategies for incorporating cyclodextrins and their derivatives into polymer matrices to prepare sustainable and biodegradable active food packaging[5].
FAQs About Succinyl Cyclodextrin
1. What degree of substitution (DS) is optimal for SuACD in drug delivery?
It depends on the balance between binding strength and inclusion capacity; DS values in the range ~3–5 are often used to allow enough carboxylate functionality while preserving cavity accessibility.
References
- Zhang Z., et al. (2024). "Advances in the preparation and application of cyclodextrin derivatives in food and the related fields." Food Research International, 195, 114952.
- Jiang L., et al. (2022). "Preparation and characterization of curcumin/β-cyclodextrin nanoparticles by nanoprecipitation to improve the stability and bioavailability of curcumin." LWT, 171, 114149.
- Zhou Y., et al. (2021). "Allicin inclusions with α-cyclodextrin effectively masking its odor: preparation, characterization, and olfactory and gustatory evaluation." J. Food Sci., 86(9), 4026-4036.
- Zhou Y., et al. (2025). "Mitigation of off-flavors in foods by cyclodextrins: Current status and future perspectives." Journal of Food Composition and Analysis., 144, 107681.
- Velázquez-Contreras F., et al. (2022). "Cyclodextrins in Polymer-Based Active Food Packaging: A Fresh Look at Nontoxic, Biodegradable, and Sustainable Technology Trends." Polymers., 14(1), 104.
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