Breast cancer is a predominant form of cancer among women worldwide (Siegel, Miller, & Jemal, 2017). Among mental illnesses related to breast cancer, depression has been the most widely studied. A high proportion of patients with breast cancer present with severe anxiety and depression (Burgess et al., 2005; Vahdaninia, Omidvari, & Montazeri, 2010), which highlights the need for alleviating their symptoms during this time. Some novel approaches, such as the use of soy isoflavones, have been proven to be effective in preventing breast cancer (Dong & Qin, 2011). Additionally, soy isoflavones can improve cognitive function and symptoms of depression or anxiety, with few side effects (Cheng et al., 2015; Lipovac et al., 2010). However, patients with cancer are increasingly turning to more integrative therapies to alleviate symptoms of anxiety and depression (Boehm, Cramer, Staroszynski, & Ostermann, 2014). The use of integrative interventions has been deemed beneficial for patients with breast cancer and has been considered useful in relieving negative