Microbiota could also play an important role, as studies show that mice which were fed with milk fermented with Lactobacillus helveticus R389 and injected with breast cancer tumour cells showed an increase in IL-10 and a decrease in IL-6 levels in serum and in mouse mammary cells, which also leads to an inhibition of breast tumour cells [70]. The gene discussed is IL10; the disease is breast neoplasm.