ナチュラルキラー細胞(NK細胞)は免疫細胞の1つです。
体内を常にパトロールし、がん細胞やウイルス感染細胞を見つけるとすぐに攻撃を開始します。
Makino S et al. Reducing the risk of infection in the elderly by dietary intake of yoghurt fermented with Lactobacillus delbrueckii ssp. bulgaricus OLL1073R-1. Br J Nutr. 2010, 104(7), 998-1006.
Nagai T et al. Effects of oral administration of yogurt fermented with Lactobacillus delbrueckii ssp. bulgaricus OLL1073R-1 and its exopolysaccharides against influenza virus infection in mice. Int Immunopharmacol. 2011, 11(12), 2246-2250.