FCS provide in addition to all necessary, growth factors, essential fatty acids. Depletion of essential fatty acids modify membrane fluidity. You may be able to reverse the fluidity effects by substituting with exogenous essential fatty acids [18:3,20:4]
Thanks for you answer, do you think there are some other effects will happen when we starve the cells, like some resistance to the bad environment? some special protein will express or sth else?