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普通牛乳经活性菌处理后为活性菌牛乳（菌乳），每天按时定量给小鼠灌胃1次，连续28天，于末次灌胃30min后进行高温（46±1℃）与低温（-20±1℃）实验。同时测定血液中丙二醛（MDA）及谷胱甘肽过氧化物酶（GSH—Px）的含量，结果表明服用菌乳的小鼠抗高温与耐低温的能力明显增强，死亡率显著降低，明显优于服用普通牛乳与人参蜂王浆的小鼠（P＜0．001）。血清中MDA含量明显低于普通牛乳组，全血中GSH—Px活力又明显高于普通牛乳组（P＜0．05）。
The normal milk was treated with active bacteria, and then the mice were inoculated once a day for 28 consecutive days. After the last 30 minutes, the mice were treated with high temperature (46 ± 1 ℃) and low temperature (-20 ℃) ± 1 ℃) experiment. The contents of malondialdehyde (MDA) and glutathione peroxidase (GSH-Px) in the blood were measured simultaneously. The results showed that the ability of antimicrobial and hypothermia resistant mice was significantly increased and the mortality was significantly reduced. Significantly better than mice taking normal milk and ginseng royal jelly (P <0.001). Serum MDA content was significantly lower than the normal milk group, the whole blood GSH-Px activity was significantly higher than the normal milk group (P <0.05).