Assessment of possibilities of strawberry jam reformulation


  • Ladislava Rýdlová University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, Department of Food Preservation, Technická, 3, 166 28, Prague 6 – Dejvice, Czech Republic, Tel.: +420220443024
  • Tereza Škorpilová University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, Department of Food Preservation, Technická, 3, 166 28, Prague 6 – Dejvice, Czech Republic, Tel.: +420220443003
  • Gabriela Juhászová University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, Department of Food Preservation, Technická, 3, 166 28, Prague 6 – Dejvice, Czech Republic, Tel.: +420220443024
  • Aleš Rajchl University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, Department of Food Preservation, Technická, 3, 166 28, Prague 6 – Dejvice, Czech Republic, Tel.: +420220443012



fruit spreads, carrageenan, texture characteristics, colour


The prevalence of excessive weight gain, obesity, and associated diseases are permanently increasing. Therefore, the interest in food products with a composition suitable for people with the aforementioned health problems is also on the rise. The changes in food composition, nowadays often called reformulation, are mainly focused on reducing the amount of salt, sugar, or fat. Strawberry spreads with different sugar (10 – 40%) and strawberry (20 – 50%) content were prepared and the influence of strawberry jam composition on gel stiffness, colour, and sensory parameters was studied. This study aimed to determine the sensorial and technological limits (sugar and strawberry content) of strawberry jam reformulation. Carrageenan was chosen as a suitable gelling agent for the preparation of these reformulated strawberry products. strawberry spreads. The applicable concentration of carrageenan for the ideal stiffness of strawberry spreads was 2%. The results of the maximum compression force show a statistically significant increase of gel stiffness with increasing addition of strawberry puree, the effect of sugar content was also statistically significant (p = 0.05). This study showed that strawberry spreads with low strawberry and/or sugar content are sensorially acceptable.


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AOAC. 2002. AOAC Official Method 942.15, 2002. Acidity (titratable) of fruit products. Gaitherburg: AOAC International. 2 p.

Ares, G., Aschemann-Witzel, J., Curutchet, M. R., Antúnez, L., Machín, L., Vidal, L., Giménez, A. 2018. Product reformulation in the context of nutritional warning labels: Exploration of consumer preferences towards food concepts in three food categories. Food Research International, vol. 107, p. 669-674.

Basu, S., Shivhare, U. S., Singh, T. V. 2013. Effect of substitution of stevioside and sucralose on rheological, spectral, color and microstructural characteristic of mango jam. Journal of Food Engineering, vol. 114, no. 4, p. 465-476.

Bursać Kovačević, D., Putnik P., Dragović-Uzelac, V., Vahčić, N., Skendrović Babojelić, M., Levaja, B. 2015. Influences of organically and conventionally grown strawberry cultivars on anthocyanins content and color in purees and low-sugar jams. Food Chemistry, vol. 181, p. 94-100.

Buttriss, J. L. 2013. Food reformulation: the challenges to the food industry. Proceedings of the Nutrition Society, vol. 72, no. 1, p. 61-69.

Cruz, A. G., Cadena, R. S., Walter, E. H. M., Mortazavian, A. M., Granato, D., Faria, J. A. F., Bolini, H. M. A. 2010. Sensory analysis: Relevance for prebiotic, probiotic, and synbiotic product development. Comprehensive Reviews in Food Science and Food Safety, vol. 9, no. 4, p. 358-373.

Deszczynski, M., Kasapis, S., Mitchell, J. R. 2003. Rheological investigation of the structural properties and aging effects in the garose/co-solute mixture. Carbohydrate Polymers, vol. 53, no. 1, p. 85-93.

DuBois, G. E., Prakash, I. 2012. Non-caloric sweeteners, sweetness modulators, and sweetener enhancers. Annual Review of Food Science and Technology, vol. 3, p. 353-380.

Ellis, A. L., Mills, T. B., Norton, I. T., Norton-Welch, A. B. 2019. The hydrophobic modification of kappa carrageenan microgel particles for the stabilisation of foams. Journal of Colloid and Interface Science, vol. 538, p. 165-173.

Goldfein, K. R., Slavin, J. L. 2015. Why sugar is added to food: Food Science 101. Comprehensive Reviews in Food Science and Food Safety, vol. 14, no. 5, p. 644-656.

Igual, M., Contreras, C., Martínez-Navarrete, N. 2014. Colour and rheological properties of non-conventional grapefruit jams: Instrumental and sensory measurement. LWT – Food Science and Technology, vol. 56, no. 1, p. 200-206.

Kadlec, P., Melzoch, K., Voldřich, M. 2012. Technologie potravin – Přehled tradičních potravinářských výrob (Food technology - Overview of traditional food production). 1st ed. Ostrava, Czech Republic : Key publishing, 569 p. (In Czech) ISBN 978-80-7418-145-0.

Kallio, H., Hakala, M., Pelkkikangas A. M., Lapveteläinen, A. 2000. Sugars and acids of strawberry varieties. European Food Research and Technology, vol. 212, p. 81-85.

Li, L., Zhang, M., Chitrakar, B., Jiang, H. 2020. Effect of combined drying method on phytochemical components, antioxidant capacity and hydroscopicity of Huyou (Citrus changshanensis) fruit. LWT – Food Science and Technology, vol. 123, 7 p.

Liao, H., Zhu, W., Zhong, K., Liu, Y. 2020. Evaluation of colour stability of clear red pitaya juice treated by thermosonication. LWT – Food Science and Technology, vol. 121, 35 p.

Lopez-Sanchez, P., Fredriksson, N., Larsson, A., Altskär, A., Ström, A. 2018. High sugar content impacts microstructure, mechanics and release of calcium-alginate gels. Food Hydrocolloids, vol. 84, p. 26-33.

Maurer, S., Junghans, A., Vilgis, T. A. 2012. Impact of xanthan gum, sucrose and fructose on the viscoelastic properties of agarose hydrogels. Food Hydrocolloids, vol. 29, no. 2, p. 298-307.

Ortiz-Tafoya, M. C., Rolland-Sabaté, A., Garnier, C., Valadez-García, J., Tecante, A. 2018. Thermal, conformational and rheological properties of κ-carrageenan-sodium stearoyl lactylate gels and solutions. Carbohydrate Polymers, vol. 193, p. 289-297.

Pérez-Herrera, A., Martínez-Gutiérrez, G. A., León-Martínez, F. M., Sánchez-Medina, M. A. 2020. The effect of the presence of seeds on the nutraceutical, sensory and rheological properties of Physalis spp. Fruits jam: A comparative analysis. Food Chemistry, vol. 302, 7 p.

Phelps, T., Angus, F., Clegg, S., Kilcast, D., Narain, C., den Ridder, C. 2006. Sensory issues in salt reduction. Food Quality and Preference, vol. 17, no. 7-8, p. 633-634.

Rýdlová, L., Hrubá, M., Ševčík, R., Rajchl, A. 2019. Reformulace potravin (Reformulation of fruit and vegetable products. Food reformulation). In Rajchl, A. Reformulace výrobků z ovoce a zeleniny. V Rajchl, A. Reformulace potravin – Hodnocení možností reformulací hlavních potravinářských komodit. 1st ed. Praha, Czech republic : Potravinářská komora České republiky, p. 107-124. (In Czech) ISBN 978-80-88019-36-7.

Shen, Y., Chen, G., Li, Y. 2018. Bread characteristic and antioxidant activities of Maillard reaction products of white pan bread containing various sugars. LWT – Food Science and Technology, vol. 95, p. 308-315.

Sinthusamran, S., Benjakul, S., Kishimura, H. 2014. Characteristics and gel properties of gelatin from skin oh seabass (Lates calcarifer) as influenced by extraction conditions. Food Chemistry, vol. 152, p. 276-284.

Sturm, K., Koron, D., Stampar, F. 2003. The composition of fruit of different strawberry varieties depending on maturity stage. Food Chemistry, vol. 83, no. 3, p. 417-422.

Tang, M., Zhu, Y., Li, D., Adhikari, B., Wang, L. 2019. Rheological, thermal and microstructural properties of casein/κ-carrageenan mixed systems. LWT – Food Science and Technology, vol. 113, 9 p.

UNI ISO 8589. 2017. Sensory analysis – General guidance for the design of test rooms.

van Raaij, J., Hendriksen, M., Verhagen, H. 2009. Potential for improvement of population diet through reformulation of commonly eaten foods. Public Health Nutrition, vol. 12, no. 3, p. 325-330.

Watase, M., Nishinari, K., Williams, P. A., Phillips, G. O. 1990. Agarose gels: Effect of sucrose, glucose, urea and guanidine hydrochloride on the rheological and thermal properties. Journal of Agricultural and Food Chemistry, vol. 38, no. 5, p. 1181-1187.

WHO. 2015. World Health Organisation: Information note about intake of sugars recommended in the WHO guideline for adults and children, 1st ed., WHO Document Production Services: Geneva, Switzerland. 49 p. ISBN 978-92-4-154902-8.

Yeung, C. H. C., Gohil, P., Rangan, A. M., Flood, V. M., Arcot, J., Gill, T. P., Louie, J. C. Y. 2017. Modelling of the impact of universal added sugar reduction through food reformulation. Scientific Reports, vol. 7, no. 1, 8 p.



How to Cite

Rýdlová, L., Škorpilová, T., Juhászová, G., & Rajchl, A. (2020). Assessment of possibilities of strawberry jam reformulation. Potravinarstvo Slovak Journal of Food Sciences, 14, 554–561.