A large randomized trial showed that adapted 6-week MBSR had short-term effectiveness for the psychological symptoms, could reduce salivary cortisol and pro-inflammatory cytokine interleukin-6 (IL-6) levels during the 6 weeks (34), and could modulate tumor necrosis factor α (TNFa) and IL-6 during 6 to 12 weeks rather than during the MBSR training period in survivors of BC (35). This evidence concerns the gene IL6 and breast cancer.