Soy ice cream as a carrier for efficient delivering of Lactobacillus casei

Abstract

Purpose

Among soy products, soy ice cream with neutral pH, high total solids contents and prebiotic oligosaccharides is an appropriate vehicle for probiotics. The purpose of this paper is to survey soy ice cream as a carrier for the efficient delivering of Lactobacillus casei, or L. casei.

Design/methodology/approach

Probiotic soy ice cream containing L. casei was produced via the powder of soy milk. The physicochemical and organoleptic properties of the product were assessed. Also, the viability of L. casei was surveyed over a 180-day period of storage at −25 °C.

Findings

The density characteristic of probiotic soy ice cream demonstrated a significant rise (P < 0.05). The result of the viability analysis showed significant alterations in the number of probiotics in this product after freezing and throughout the 180-day period (P < 0.05). The most noticeable drop was seen throughout the first 60 days about 1.83 logs after that the trend of survival of this probiotic strain leveled off over the next 120 days. Also, no significant differences were found in the organoleptic properties of both ice creams.

Originality/value

Soy ice cream with prebiotic elements protected the growing and activity of probiotic bacteria. The results showed that L. casei is a good probiotic for soy ice cream.

Citation

Homayouni, A., Rezaei Mokarram, R., Norouzi, S., Dehnad, A., Barkhordari, A., Homayouni, H. and Pourjafar, H. (2021), "Soy ice cream as a carrier for efficient delivering of Lactobacillus casei", Nutrition & Food Science, Vol. 51 No. 1, pp. 61-70. https://doi.org/10.1108/NFS-11-2019-0349