Asian Journal of Dairy and Food Research, volume 40 issue 1 (march 2021) : 100-105

Developing a Low-fat Drinking Yoghurt by Incorporating Green Tea (Camellia sinensis) Extract as a Functional Ingredient

R.A.A.S. Ranasinghe, M.P. Edirisinghe, W.A.D. Nayananjalie
1Department of Animal and Food Sciences, Faculty of Agriculture, Rajarata University of Sri Lanka, Anuradhapura, Sri Lanka.
Cite article:- Ranasinghe R.A.A.S., Edirisinghe M.P., Nayananjalie W.A.D. (2021). Developing a Low-fat Drinking Yoghurt by Incorporating Green Tea (Camellia sinensis) Extract as a Functional Ingredient. Asian Journal of Dairy and Food Research. 40(1): 100-105. doi: 10.18805/ajdfr.DR-209.
Background: Nowadays people are health-concerned and consume more of functional foods. Thus, this study is focused on developing a drinking yoghurt incorporated with green tea (Camellia sinensis) extract as a functional ingredient.
Methods: Green tea extract (GTE) was obtained by brewing 02 g of dried green tea leaves in 100 mL of water at 90°C for 30 minutes. Drinking yoghurts were prepared with standardized sterilized milk incorporated with 0%, 10%, 15%, 20% and 25% (v/v) of GTE. Physio-chemical, microbial and sensory analysis were conducted to evaluate the quality attributes of the developed product. It was stored under refrigerated conditions (4°C) for 15 days.
Result: Sensory data showed that 25% green tea extract incorporated drinking yoghurt had the best organoleptic properties. It had the significantly (p<0.05) highest ash and lowest fat contents compared to the control. Significantly (p<0.05) higher pH and lower titratable acidity values were observed in 25% green tea extract incorporated yoghurt compared to the control on 15th day of storage. The microbial analysis did not show the presence of coliform. In conclusion, yoghurt incorporated with 25% (v/v) green tea extract has better organoleptic properties and nutritional value while it can be stored under refrigerated conditions for 15 days without any quality deterioration while producing at affordable price.
  1. Agarwal, S. and Prasad, R. (2013). Nutritional supplementation of low-fat frozen yoghurt incorporated with carrot pulp, Asian Journal of Dairy and Food Research. 32: 228-234.
  2. Allgeyer, L.C., Miller, M.J. and Lee, S.Y. (2010). Sensory and microbiological quality of yoghurt drinks with prebiotics and probiotics. Journal of Dairy Science. 93: 4471-4479. 
  3. AOAC (2003). Official Methods of Analysis (18th ed.). Association of Official Analytical Chemists, Washington DC, U.S.A.
  4. Chaturvedula, V.S.P. and Prakash, I. (2011). The aroma, taste, colour and bioactive constituents of tea. Journal of Medicinal Plants Research. 5: 2110-2124.
  5. Fidaleo, M., Lavecchia, R., Maffei, G. and Zuorro, A. (2015). Phenolic extracts from bilberry (Vaccinium myrtillus L.) residues as new functional food ingredients. International Journal of Applied Engineering Research. 10: 37125-37128.
  6. Govindammal, D., Seethalakshmi, M. and Thangaraj, S. (2017). An evaluation of physiochemical properties on aloevera gel fortified yoghurt, Asian Journal of Dairy and Food Research. 36: 288-291. doi: 10.18805/ajdfr.dr-1244.
  7. Jaziri, I., Slama, M.B., Mhadhbi, H., Urdaci, M.C. and Hamdi, M. (2009). Effect of green and black teas (Camellia sinensis L.) on the characteristic microflora of yogurt during fermentation and refrigerated storage. Food Chemistry. 112: 614-620. 
  8. Kale, K.G., Chavan, K.D., Pawar, B.K. and Bhosale, D.N. (2008). Influence of levels of fruit and sugar on chemical composition of pomegranate yoghurt, Asian Journal of Dairy and Food Research. 27: 11-18.
  9. Khan, N. and Mukhtar, H. (2007). Tea polyphenols for health promotion. Life Sciences. 81: 519-533.
  10. Lamothe, S., Azimy, N., Bazinet, L., Couillard, C. and Britten, M. (2014). Interaction of green tea polyphenols with dairy matrices in a simulated gastrointestinal environment. Food and Function. Royal Society of Chemistry. 5: 2621-2631.
  11. Mckinley, M.C. (2005). The nutrition and health benefits of yoghurt. International Journal of Dairy Technology. 58: 1-12. 
  12. Nakagawa, M. (1970). Constituents in tea leaf and their contribution to the taste of green tea liquor. Japan Agricultural Research Quarterly. 5: 43-47.
  13. Narayana, R. and Kale, A. (2019). Functional probiotic yoghurt with spirulina, Asian Journal of Dairy and Food Research. 38: 311-314. doi: 10.18805/ajdfr.dr-1472.
  14. Patil, A.P., Chavan, K.D. and Bhosale, D.N. (2015). Influence of addition of guava pulp and sugar on sensory quality of guava yoghurt, Asian Journal of Dairy and Food Research. 28: 95-100.
  15. Raut, V., Sawant, P. Sawant, D. and Ingole, A.S. (2015). Studies on preparation of mango yoghurt drink, Asian Journal of Dairy and Food Research. 34: 13-17. doi: 10.5958/0976-0563.2015.00003.2.
  16. Routray, W. and Mishra, H.N. (2011). Scientific and technical aspects of yogurt aroma and taste. Comprehensive Reviews in Food Science and Food Safety. 10: 208-220. 
  17. Sri Lanka Standards Institution (SLSI). (2016). Sri Lanka Standards 824. Specification for yoghurt. Sri Lanka Standard Institution, Colombo, Sri Lanka.
  18. Thomas, N. and Wansapala, M.A.J. (2017). Utilization of green tea (Camellia and inensis) extract for the production of antioxidant rich functional drinking yoghurt. International Journal of Food Science and Nutrrition. 2: 188-195.
  19. Weerathilake, W.A.D.V., Rasika, D.M.D., Ruwanmali, J.K.U. and Munasinghe, M.A.D.D. (2014). The evolution, processing, varieties and health benefits of yogurt. International Journal of Scientific and Research Publications. 4: 2250-3153. 
  20. Ziaedini, A., Jafari, A. and Zakeri, A. (2010). Extraction of antioxidants and caffeine from green tea (Camellia Sinensis) leaves. Food Science and Technology Internationa. 16: 505-512.

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