CD4 and breast cancer: Regarding the immune system responses, omega‐3 FAs supplementation also resulted in unchanged CD4+ and CD8+ T cells in BC patients without metastasis receiving EPA‐ and DHA‐supplemented FO (2 g/day of FO concentrate containing 1.8 g of omega‐3 fatty acids for 30 days) in Paixão et al.'s (2017) study.