Within a cell, n-3 PUFAs can be found incorporated into phospholipid membranes where elevating levels will replace existing n-6 PUFAs thereby altering the composition and properties of lipid rafts (Lordan et al., 2017; Lordan et al., 2020). The increased incorporation of n-3 PUFAs into membrane bilayers can have a role in mediating immunomodulatory effects by altering membrane composition, fluidity and function. These changes will impact membrane-mediated signaling, protein trafficking, generation of bioactive lipids, cytokine secretion and gene activation in both innate and adaptive immune responses. For example, a change in fluidity can interfere with the dimerization and expression of the TLR4 subunits, blocking the downstream inflammatory reaction (Ciesielska & Kwiatkowska, 2015; Takashima et al., 2016). Evidence of these effects by n-3 PUFAs have been demonstrated to impact the maturation of dendritic cells, macrophage function and T and B cell polarization/activation (Katagiri, Kiyokawa, & Fujimoto, 2001; Kim et al., 2010; McMurray, Bonilla, & Chapkin, 2011; Rockett, Salameh, Carraway, Morrison, & Shaikh, 2010; Shaikh and Edidin, 2006, Shaikh and Edidin, 2008). Interestingly, DHA appears to be better than EPA in replacing n-6 PUFAs and cholesterol in plasma membranes of aortic endothelial cells enhancing the fluidity of the phospholipid membrane (Hashimoto, Hossain, Yamasaki, Yazawa, & Masumura, 1999).