PGR and breast cancer: EPA and DHA are readily incorporated into tumour lipids, [32], PL [11,12,13,17,24] and plasma membrane raft PL [13,17] of triple negative (ER−, PR−, HER2−) MDA-MB-231 [11,12,13,17,24,32] and ER+ MCF-7 BC cells [11,12,17,24,32].